21121155046053 has 12 divisors (see below), whose sum is σ = 30727819493280. Its totient is φ = 13979469526056.

The previous prime is 21121155046031. The next prime is 21121155046109. The reversal of 21121155046053 is 35064055112112.

21121155046053 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 11 + 550 + 46 + 0 + 53 = 666.

It is not a de Polignac number, because 21121155046053 - 2²⁶ = 21121087937189 is a prime.

It is a super-2 number, since 2×21121155046053² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121155045999 and 21121155046017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121155041053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8441707401 + ... + 8441709902.

It is an arithmetic number, because the mean of its divisors is an integer number (2560651624440).

Almost surely, 2^{21121155046053} is an apocalyptic number.

It is an amenable number.

21121155046053 is a deficient number, since it is larger than the sum of its proper divisors (9606664447227).

21121155046053 is a wasteful number, since it uses less digits than its factorization.

21121155046053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16883417448 (or 16883417445 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 21121155046053 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty-five million, forty-six thousand, fifty-three".