102111101211210 has 128 divisors (see below), whose sum is σ = 302515502575104. Its totient is φ = 21480390328320.

The previous prime is 102111101211149. The next prime is 102111101211293. The reversal of 102111101211210 is 12112101111201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102111101211210.

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, 54574551 + ... + 56414570.

It is an arithmetic number, because the mean of its divisors is an integer number (2363402363868).

Almost surely, 2^{102111101211210} is an apocalyptic number.

102111101211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102111101211210 is an abundant number, since it is smaller than the sum of its proper divisors (200404401363894).

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

102111101211210 is a wasteful number, since it uses less digits than its factorization.

102111101211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110989488.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 102111101211210 its reverse (12112101111201), we get a palindrome (114223202322411).

The spelling of 102111101211210 in words is "one hundred two trillion, one hundred eleven billion, one hundred one million, two hundred eleven thousand, two hundred ten".