21161014501 has 16 divisors (see below), whose sum is σ = 23843635200. Its totient is φ = 18605617200.

The previous prime is 21161014489. The next prime is 21161014541. The reversal of 21161014501 is 10541016112.

It is a happy number.

It is not a de Polignac number, because 21161014501 - 2¹⁵ = 21160981733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161014541) 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, 582180 + ... + 617458.

It is an arithmetic number, because the mean of its divisors is an integer number (1490227200).

Almost surely, 2^21161014501 is an apocalyptic number.

It is an amenable number.

21161014501 is a deficient number, since it is larger than the sum of its proper divisors (2682620699).

21161014501 is a wasteful number, since it uses less digits than its factorization.

21161014501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37080.

The product of its (nonzero) digits is 240, while the sum is 22.

The spelling of 21161014501 in words is "twenty-one billion, one hundred sixty-one million, fourteen thousand, five hundred one".