20012321011220 has 48 divisors (see below), whose sum is σ = 42908601597120. Its totient is φ = 7838496830976.

The previous prime is 20012321011169. The next prime is 20012321011231. The reversal of 20012321011220 is 2211012321002.

It is a super-2 number, since 2×20012321011220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 53155850 + ... + 53531009.

It is an arithmetic number, because the mean of its divisors is an integer number (893929199940).

Almost surely, 2^{20012321011220} is an apocalyptic number.

20012321011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012321011220 is an abundant number, since it is smaller than the sum of its proper divisors (22896280585900).

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

20012321011220 is a wasteful number, since it uses less digits than its factorization.

20012321011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106687064 (or 106687062 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20012321011220 its reverse (2211012321002), we get a palindrome (22223333332222).

The spelling of 20012321011220 in words is "twenty trillion, twelve billion, three hundred twenty-one million, eleven thousand, two hundred twenty".