21340612401 has 32 divisors (see below), whose sum is σ = 29755772928. Its totient is φ = 13594479360.

The previous prime is 21340612357. The next prime is 21340612417. The reversal of 21340612401 is 10421604312.

It is not a de Polignac number, because 21340612401 - 2⁷ = 21340612273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21340612301) 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, 1057516 + ... + 1077506.

It is an arithmetic number, because the mean of its divisors is an integer number (929867904).

Almost surely, 2^21340612401 is an apocalyptic number.

It is an amenable number.

21340612401 is a deficient number, since it is larger than the sum of its proper divisors (8415160527).

21340612401 is a wasteful number, since it uses less digits than its factorization.

21340612401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20221.

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 21340612401 in words is "twenty-one billion, three hundred forty million, six hundred twelve thousand, four hundred one".