121210201011210 has 64 divisors (see below), whose sum is σ = 294357770883072. Its totient is φ = 31940365513536.

The previous prime is 121210201011169. The next prime is 121210201011217. The reversal of 121210201011210 is 12110102012121.

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 121210201011210.

It is not an unprimeable number, because it can be changed into a prime (121210201011217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40555474 + ... + 43441533.

It is an arithmetic number, because the mean of its divisors is an integer number (4599340170048).

Almost surely, 2^{121210201011210} is an apocalyptic number.

121210201011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210201011210 is an abundant number, since it is smaller than the sum of its proper divisors (173147569871862).

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

121210201011210 is a wasteful number, since it uses less digits than its factorization.

121210201011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83997587.

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

Adding to 121210201011210 its reverse (12110102012121), we get a palindrome (133320303023331).

The spelling of 121210201011210 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred one million, eleven thousand, two hundred ten".