121201100100010 has 32 divisors (see below), whose sum is σ = 249328385925120. Its totient is φ = 41554594795392.

The previous prime is 121201100100001. The next prime is 121201100100011. The reversal of 121201100100010 is 10001001102121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 121201100100010.

It is not an unprimeable number, because it can be changed into a prime (121201100100011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61214167 + ... + 63163093.

It is an arithmetic number, because the mean of its divisors is an integer number (7791512060160).

Almost surely, 2^{121201100100010} is an apocalyptic number.

121201100100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201100100010 is an abundant number, since it is smaller than the sum of its proper divisors (128127285825110).

121201100100010 is a wasteful number, since it uses less digits than its factorization.

121201100100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837350.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121201100100010 its reverse (10001001102121), we get a palindrome (131202101202131).

The spelling of 121201100100010 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred million, one hundred thousand, ten".