21102122012202 has 160 divisors (see below), whose sum is σ = 58995132641280. Its totient is φ = 5477056665120.

The previous prime is 21102122012201. The next prime is 21102122012203. The reversal of 21102122012202 is 20221022120112.

It is a happy number.

21102122012202 is a `hidden beast` number, since 21 + 10 + 212 + 201 + 220 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21102122012201) and next prime (21102122012203).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21102122012201) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16433199 + ... + 17670717.

It is an arithmetic number, because the mean of its divisors is an integer number (368719579008).

Almost surely, 2^{21102122012202} is an apocalyptic number.

21102122012202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21102122012202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29497566320640).

21102122012202 is an abundant number, since it is smaller than the sum of its proper divisors (37893010629078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102122012202 is a wasteful number, since it uses less digits than its factorization.

21102122012202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238918 (or 1238909 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21102122012202 its reverse (20221022120112), we get a palindrome (41323144132314).

The spelling of 21102122012202 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, twelve thousand, two hundred two".