20121113210 has 32 divisors (see below), whose sum is σ = 40872988800. Its totient is φ = 7064464960.

The previous prime is 20121113191. The next prime is 20121113251. The reversal of 20121113210 is 1231112102.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3150590 + ... + 3156969.

It is an arithmetic number, because the mean of its divisors is an integer number (1277280900).

Almost surely, 2^20121113210 is an apocalyptic number.

20121113210 is an abundant number, since it is smaller than the sum of its proper divisors (20751875590).

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

20121113210 is a wasteful number, since it uses less digits than its factorization.

20121113210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307606.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20121113210 its reverse (1231112102), we get a palindrome (21352225312).

It can be divided in two parts, 20121 and 113210, that added together give a palindrome (133331).

The spelling of 20121113210 in words is "twenty billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred ten".