20111220112210 has 32 divisors (see below), whose sum is σ = 36559971015984. Its totient is φ = 7964544000000.

The previous prime is 20111220112163. The next prime is 20111220112253. The reversal of 20111220112210 is 1221102211102.

It can be written as a sum of positive squares in 8 ways, for example, as 13271441714001 + 6839778398209 = 3642999^2 + 2615297^2 .

It is a super-2 number, since 2×20111220112210² (a number of 27 digits) contains 22 as substring.

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, 27925450 + ... + 28636570.

Almost surely, 2^{20111220112210} is an apocalyptic number.

20111220112210 is a deficient number, since it is larger than the sum of its proper divisors (16448750903774).

20111220112210 is a wasteful number, since it uses less digits than its factorization.

20111220112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739230.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111220112210 its reverse (1221102211102), we get a palindrome (21332322323312).

The spelling of 20111220112210 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, one hundred twelve thousand, two hundred ten".