21138701355222 has 64 divisors (see below), whose sum is σ = 46304060534784. Its totient is φ = 6380218736640.

The previous prime is 21138701355217. The next prime is 21138701355253. The reversal of 21138701355222 is 22255310783112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239849508 + ... + 239937624.

It is an arithmetic number, because the mean of its divisors is an integer number (723500945856).

Almost surely, 2^{21138701355222} is an apocalyptic number.

21138701355222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21138701355222 is an abundant number, since it is smaller than the sum of its proper divisors (25165359179562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21138701355222 is a wasteful number, since it uses less digits than its factorization.

21138701355222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102533.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 21138701355222 in words is "twenty-one trillion, one hundred thirty-eight billion, seven hundred one million, three hundred fifty-five thousand, two hundred twenty-two".