21256030426011 has 32 divisors (see below), whose sum is σ = 29541168763392. Its totient is φ = 13585456442880.

The previous prime is 21256030425991. The next prime is 21256030426019. The reversal of 21256030426011 is 11062403065212.

It is not a de Polignac number, because 21256030426011 - 2¹⁹ = 21256029901723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21256030426019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5577160 + ... + 8580021.

It is an arithmetic number, because the mean of its divisors is an integer number (923161523856).

Almost surely, 2^{21256030426011} is an apocalyptic number.

21256030426011 is a deficient number, since it is larger than the sum of its proper divisors (8285138337381).

21256030426011 is a wasteful number, since it uses less digits than its factorization.

21256030426011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14157443.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21256030426011 in words is "twenty-one trillion, two hundred fifty-six billion, thirty million, four hundred twenty-six thousand, eleven".