21021631701466 has 32 divisors (see below), whose sum is σ = 35662589274816. Its totient is φ = 9209915280000.

The previous prime is 21021631701461. The next prime is 21021631701503. The reversal of 21021631701466 is 66410713612012.

It is not an unprimeable number, because it can be changed into a prime (21021631701461) 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, 140320185 + ... + 140469916.

It is an arithmetic number, because the mean of its divisors is an integer number (1114455914838).

Almost surely, 2^{21021631701466} is an apocalyptic number.

21021631701466 is a deficient number, since it is larger than the sum of its proper divisors (14640957573350).

21021631701466 is a wasteful number, since it uses less digits than its factorization.

21021631701466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280790238.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 21021631701466 in words is "twenty-one trillion, twenty-one billion, six hundred thirty-one million, seven hundred one thousand, four hundred sixty-six".