20111220012210 has 32 divisors (see below), whose sum is σ = 48267352992960. Its totient is φ = 5362944785088.

The previous prime is 20111220012197. The next prime is 20111220012217. The reversal of 20111220012210 is 1221002211102.

It is a super-2 number, since 2×20111220012210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20111220012210.

It is not an unprimeable number, because it can be changed into a prime (20111220012217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582381 + ... + 6368799.

It is an arithmetic number, because the mean of its divisors is an integer number (1508354781030).

Almost surely, 2^{20111220012210} is an apocalyptic number.

20111220012210 is an abundant number, since it is smaller than the sum of its proper divisors (28156132980750).

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

20111220012210 is a wasteful number, since it uses less digits than its factorization.

20111220012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902282.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20111220012210 its reverse (1221002211102), we get a palindrome (21332222223312).

The spelling of 20111220012210 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, two hundred ten".