20101220112012 has 48 divisors (see below), whose sum is σ = 50720346533472. Its totient is φ = 6159326929920.

The previous prime is 20101220112011. The next prime is 20101220112013. The reversal of 20101220112012 is 21021102210102.

It is an interprime number because it is at equal distance from previous prime (20101220112011) and next prime (20101220112013).

It is a junction number, because it is equal to n+sod(n) for n = 20101220111982 and 20101220112000.

It is not an unprimeable number, because it can be changed into a prime (20101220112011) 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, 267294303 + ... + 267369494.

It is an arithmetic number, because the mean of its divisors is an integer number (1056673886114).

Almost surely, 2^{20101220112012} is an apocalyptic number.

It is an amenable number.

20101220112012 is an abundant number, since it is smaller than the sum of its proper divisors (30619126421460).

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

20101220112012 is a wasteful number, since it uses less digits than its factorization.

20101220112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534664058 (or 534664056 counting only the distinct ones).

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

Adding to 20101220112012 its reverse (21021102210102), we get a palindrome (41122322322114).

The spelling of 20101220112012 in words is "twenty trillion, one hundred one billion, two hundred twenty million, one hundred twelve thousand, twelve".