21121026104344 has 16 divisors (see below), whose sum is σ = 39605628336120. Its totient is φ = 10559525214720.

The previous prime is 21121026104309. The next prime is 21121026104401. The reversal of 21121026104344 is 44340162012112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123388809 + ... + 123559864.

Almost surely, 2^{21121026104344} is an apocalyptic number.

It is an amenable number.

21121026104344 is a deficient number, since it is larger than the sum of its proper divisors (18484602231776).

21121026104344 is a wasteful number, since it uses less digits than its factorization.

21121026104344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246959370 (or 246959366 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 21121026104344 its reverse (44340162012112), we get a palindrome (65461188116456).

The spelling of 21121026104344 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-six million, one hundred four thousand, three hundred forty-four".