20121120210 has 64 divisors (see below), whose sum is σ = 48733985664. Its totient is φ = 5316595200.

The previous prime is 20121120191. The next prime is 20121120223. The reversal of 20121120210 is 1202112102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1519237 + ... + 1532423.

It is an arithmetic number, because the mean of its divisors is an integer number (761468526).

Almost surely, 2^20121120210 is an apocalyptic number.

20121120210 is an abundant number, since it is smaller than the sum of its proper divisors (28612865454).

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

20121120210 is a wasteful number, since it uses less digits than its factorization.

20121120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20121120210 its reverse (1202112102), we get a palindrome (21323232312).

The spelling of 20121120210 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred ten".