102111012021102 has 128 divisors (see below), whose sum is σ = 241935671577600. Its totient is φ = 28111319018496.

The previous prime is 102111012021097. The next prime is 102111012021157. The reversal of 102111012021102 is 201120210111201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1953915049 + ... + 1953967307.

It is an arithmetic number, because the mean of its divisors is an integer number (1890122434200).

Almost surely, 2^{102111012021102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102111012021102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120967835788800).

102111012021102 is an abundant number, since it is smaller than the sum of its proper divisors (139824659556498).

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

102111012021102 is a wasteful number, since it uses less digits than its factorization.

102111012021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55530.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102111012021102 its reverse (201120210111201), we get a palindrome (303231222132303).

The spelling of 102111012021102 in words is "one hundred two trillion, one hundred eleven billion, twelve million, twenty-one thousand, one hundred two".