20121102210 has 64 divisors (see below), whose sum is σ = 52725893760. Its totient is φ = 4873658880.

The previous prime is 20121102181. The next prime is 20121102223. The reversal of 20121102210 is 1220112102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368136 + ... + 419244.

It is an arithmetic number, because the mean of its divisors is an integer number (823842090).

Almost surely, 2^20121102210 is an apocalyptic number.

20121102210 is an abundant number, since it is smaller than the sum of its proper divisors (32604791550).

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

20121102210 is a wasteful number, since it uses less digits than its factorization.

20121102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52323.

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

Adding to 20121102210 its reverse (1220112102), we get a palindrome (21341214312).

The spelling of 20121102210 in words is "twenty billion, one hundred twenty-one million, one hundred two thousand, two hundred ten".