20012211212120 has 32 divisors (see below), whose sum is σ = 45029961681120. Its totient is φ = 8004442448640.

The previous prime is 20012211212101. The next prime is 20012211212141. The reversal of 20012211212120 is 2121211221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13079732 + ... + 14529411.

It is an arithmetic number, because the mean of its divisors is an integer number (1407186302535).

Almost surely, 2^{20012211212120} is an apocalyptic number.

20012211212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012211212120 is an abundant number, since it is smaller than the sum of its proper divisors (25017750469000).

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

20012211212120 is a wasteful number, since it uses less digits than its factorization.

20012211212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27627275 (or 27627271 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20012211212120 its reverse (2121211221002), we get a palindrome (22133422433122).

The spelling of 20012211212120 in words is "twenty trillion, twelve billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty".