21270788672001 has 16 divisors (see below), whose sum is σ = 31330966056960. Its totient is φ = 12728204957520.

The previous prime is 21270788671999. The next prime is 21270788672011. The reversal of 21270788672001 is 10027688707212.

It is not a de Polignac number, because 21270788672001 - 2¹ = 21270788671999 is a prime.

It is a super-2 number, since 2×21270788672001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21270788672011) 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, 4079550265 + ... + 4079555478.

It is an arithmetic number, because the mean of its divisors is an integer number (1958185378560).

Almost surely, 2^{21270788672001} is an apocalyptic number.

It is an amenable number.

21270788672001 is a deficient number, since it is larger than the sum of its proper divisors (10060177384959).

21270788672001 is a wasteful number, since it uses less digits than its factorization.

21270788672001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8159105836.

The product of its (nonzero) digits is 1053696, while the sum is 51.

The spelling of 21270788672001 in words is "twenty-one trillion, two hundred seventy billion, seven hundred eighty-eight million, six hundred seventy-two thousand, one".