21655055012422 has 16 divisors (see below), whose sum is σ = 34991996382000. Its totient is φ = 9991568297952.

The previous prime is 21655055012413. The next prime is 21655055012447. The reversal of 21655055012422 is 22421055055612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127933672 + ... + 128102827.

It is an arithmetic number, because the mean of its divisors is an integer number (2186999773875).

Almost surely, 2^{21655055012422} is an apocalyptic number.

21655055012422 is a deficient number, since it is larger than the sum of its proper divisors (13336941369578).

21655055012422 is a wasteful number, since it uses less digits than its factorization.

21655055012422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256039767.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 21655055012422 in words is "twenty-one trillion, six hundred fifty-five billion, fifty-five million, twelve thousand, four hundred twenty-two".