102021121321110 has 160 divisors (see below), whose sum is σ = 280882359217152. Its totient is φ = 26555971176000.

The previous prime is 102021121321081. The next prime is 102021121321111. The reversal of 102021121321110 is 11123121120201.

It is a happy number.

102021121321110 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 211 + 21 + 321 + 110 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021121321111) 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, 53643985 + ... + 55513235.

Almost surely, 2^{102021121321110} is an apocalyptic number.

102021121321110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102021121321110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140441179608576).

102021121321110 is an abundant number, since it is smaller than the sum of its proper divisors (178861237896042).

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

102021121321110 is a wasteful number, since it uses less digits than its factorization.

102021121321110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870880 (or 1870871 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 102021121321110 its reverse (11123121120201), we get a palindrome (113144242441311).

The spelling of 102021121321110 in words is "one hundred two trillion, twenty-one billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred ten".