20121121111210 has 16 divisors (see below), whose sum is σ = 41392020571776. Its totient is φ = 6898670095248.

The previous prime is 20121121111181. The next prime is 20121121111229. The reversal of 20121121111210 is 1211112112102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143722293582 + ... + 143722293721.

It is an arithmetic number, because the mean of its divisors is an integer number (2587001285736).

Almost surely, 2^{20121121111210} is an apocalyptic number.

20121121111210 is an abundant number, since it is smaller than the sum of its proper divisors (21270899460566).

20121121111210 is a wasteful number, since it uses less digits than its factorization.

20121121111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287444587317.

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

Adding to 20121121111210 its reverse (1211112112102), we get a palindrome (21332233223312).

The spelling of 20121121111210 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".