21214064265465 has 16 divisors (see below), whose sum is σ = 34731863356608. Its totient is φ = 11051047430976.

The previous prime is 21214064265421. The next prime is 21214064265473. The reversal of 21214064265465 is 56456246041212.

It is not a de Polignac number, because 21214064265465 - 2¹⁹ = 21214063741177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16445010414 + ... + 16445011703.

It is an arithmetic number, because the mean of its divisors is an integer number (2170741459788).

Almost surely, 2^{21214064265465} is an apocalyptic number.

It is an amenable number.

21214064265465 is a deficient number, since it is larger than the sum of its proper divisors (13517799091143).

21214064265465 is a wasteful number, since it uses less digits than its factorization.

21214064265465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32890022168.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 21214064265465 in words is "twenty-one trillion, two hundred fourteen billion, sixty-four million, two hundred sixty-five thousand, four hundred sixty-five".