21112020001072 has 80 divisors (see below), whose sum is σ = 54920779345152. Its totient is φ = 7592734460160.

The previous prime is 21112020000989. The next prime is 21112020001073. The reversal of 21112020001072 is 27010002021112.

It is a super-2 number, since 2×21112020001072² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112020001073) 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, 659075518 + ... + 659107549.

Almost surely, 2^{21112020001072} is an apocalyptic number.

21112020001072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21112020001072 is an abundant number, since it is smaller than the sum of its proper divisors (33808759344080).

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

21112020001072 is a wasteful number, since it uses less digits than its factorization.

21112020001072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318183106 (or 1318183100 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21112020001072 its reverse (27010002021112), we get a palindrome (48122022022184).

The spelling of 21112020001072 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one thousand, seventy-two".