102121100121210 has 16 divisors (see below), whose sum is σ = 245090640290976. Its totient is φ = 27232293365648.

The previous prime is 102121100121137. The next prime is 102121100121217. The reversal of 102121100121210 is 12121001121201.

It is a happy number.

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 102121100121210.

It is not an unprimeable number, because it can be changed into a prime (102121100121217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1702018335324 + ... + 1702018335383.

It is an arithmetic number, because the mean of its divisors is an integer number (15318165018186).

Almost surely, 2^{102121100121210} is an apocalyptic number.

102121100121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102121100121210 is an abundant number, since it is smaller than the sum of its proper divisors (142969540169766).

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

102121100121210 is a wasteful number, since it uses less digits than its factorization.

102121100121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404036670717.

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

Adding to 102121100121210 its reverse (12121001121201), we get a palindrome (114242101242411).

Subtracting from 102121100121210 its reverse (12121001121201), we obtain a palindrome (90000099000009).

The spelling of 102121100121210 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, two hundred ten".