21121023420488 has 32 divisors (see below), whose sum is σ = 40941593722560. Its totient is φ = 10207045483200.

The previous prime is 21121023420487. The next prime is 21121023420583. The reversal of 21121023420488 is 88402432012112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21121023420487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236229506 + ... + 236318897.

It is an arithmetic number, because the mean of its divisors is an integer number (1279424803830).

Almost surely, 2^{21121023420488} is an apocalyptic number.

It is an amenable number.

21121023420488 is a deficient number, since it is larger than the sum of its proper divisors (19820570302072).

21121023420488 is a wasteful number, since it uses less digits than its factorization.

21121023420488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472548597 (or 472548593 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The spelling of 21121023420488 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, four hundred twenty thousand, four hundred eighty-eight".