21210101211222 has 48 divisors (see below), whose sum is σ = 57294818860032. Its totient is φ = 5509117197360.

The previous prime is 21210101211199. The next prime is 21210101211289. The reversal of 21210101211222 is 22211210101212.

21210101211222 is a `hidden beast` number, since 21 + 210 + 1 + 0 + 1 + 211 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210101211195 and 21210101211204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7651550278 + ... + 7651553049.

It is an arithmetic number, because the mean of its divisors is an integer number (1193642059584).

Almost surely, 2^{21210101211222} is an apocalyptic number.

21210101211222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210101211222 is an abundant number, since it is smaller than the sum of its proper divisors (36084717648810).

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

21210101211222 is a wasteful number, since it uses less digits than its factorization.

21210101211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15303103353 (or 15303103350 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21210101211222 its reverse (22211210101212), we get a palindrome (43421311312434).

The spelling of 21210101211222 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred eleven thousand, two hundred twenty-two".