21121155046054 has 64 divisors (see below), whose sum is σ = 40522776560640. Its totient is φ = 8037574686720.

The previous prime is 21121155046031. The next prime is 21121155046109. The reversal of 21121155046054 is 45064055112112.

It is a super-2 number, since 2×21121155046054² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8600562 + ... + 10780165.

It is an arithmetic number, because the mean of its divisors is an integer number (633168383760).

Almost surely, 2^{21121155046054} is an apocalyptic number.

21121155046054 is a deficient number, since it is larger than the sum of its proper divisors (19401621514586).

21121155046054 is a wasteful number, since it uses less digits than its factorization.

21121155046054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19381013.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 21121155046054 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty-five million, forty-six thousand, fifty-four".