21150164131421 has 16 divisors (see below), whose sum is σ = 22961694526848. Its totient is φ = 19365143678400.

The previous prime is 21150164131373. The next prime is 21150164131493. The reversal of 21150164131421 is 12413146105112.

It is not a de Polignac number, because 21150164131421 - 2³⁸ = 20875286224477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150164151421) 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, 745760 + ... + 6546486.

It is an arithmetic number, because the mean of its divisors is an integer number (1435105907928).

Almost surely, 2^{21150164131421} is an apocalyptic number.

It is an amenable number.

21150164131421 is a deficient number, since it is larger than the sum of its proper divisors (1811530395427).

21150164131421 is a wasteful number, since it uses less digits than its factorization.

21150164131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803012.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 21150164131421 in words is "twenty-one trillion, one hundred fifty billion, one hundred sixty-four million, one hundred thirty-one thousand, four hundred twenty-one".