20010012221056 has 64 divisors (see below), whose sum is σ = 46832873925600. Its totient is φ = 8395809315840.

The previous prime is 20010012220973. The next prime is 20010012221057. The reversal of 20010012221056 is 65012221001002.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20010012221057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546583866 + ... + 546620473.

Almost surely, 2^{20010012221056} is an apocalyptic number.

20010012221056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20010012221056 is an abundant number, since it is smaller than the sum of its proper divisors (26822861704544).

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

20010012221056 is a wasteful number, since it uses less digits than its factorization.

20010012221056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093204377 (or 1093204365 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20010012221056 its reverse (65012221001002), we get a palindrome (85022233222058).

The spelling of 20010012221056 in words is "twenty trillion, ten billion, twelve million, two hundred twenty-one thousand, fifty-six".