21121513532054 has 32 divisors (see below), whose sum is σ = 34155824865120. Its totient is φ = 9737980012800.

The previous prime is 21121513532011. The next prime is 21121513532083. The reversal of 21121513532054 is 45023531512112.

It is a super-2 number, since 2×21121513532054² (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 15 ways as a sum of consecutive naturals, for example, 95510042 + ... + 95730930.

It is an arithmetic number, because the mean of its divisors is an integer number (1067369527035).

Almost surely, 2^{21121513532054} is an apocalyptic number.

21121513532054 is a deficient number, since it is larger than the sum of its proper divisors (13034311333066).

21121513532054 is a wasteful number, since it uses less digits than its factorization.

21121513532054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224816.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 21121513532054 in words is "twenty-one trillion, one hundred twenty-one billion, five hundred thirteen million, five hundred thirty-two thousand, fifty-four".