21116012160554 has 4 divisors (see below), whose sum is σ = 31674018240834. Its totient is φ = 10558006080276.

The previous prime is 21116012160547. The next prime is 21116012160599. The reversal of 21116012160554 is 45506121061112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18230141684329 + 2885870476225 = 4269677^2 + 1698785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5279003040137 + ... + 5279003040140.

Almost surely, 2^{21116012160554} is an apocalyptic number.

21116012160554 is a deficient number, since it is larger than the sum of its proper divisors (10558006080280).

21116012160554 is a wasteful number, since it uses less digits than its factorization.

21116012160554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558006080279.

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 21116012160554 in words is "twenty-one trillion, one hundred sixteen billion, twelve million, one hundred sixty thousand, five hundred fifty-four".