21442055251311 has 8 divisors (see below), whose sum is σ = 31766007779760. Its totient is φ = 14294703500856.

The previous prime is 21442055251301. The next prime is 21442055251319. The reversal of 21442055251311 is 11315255024412.

21442055251311 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 20 + 552 + 51 + 31 + 1 = 666.

It is not a de Polignac number, because 21442055251311 - 2¹⁵ = 21442055218543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442055251319) 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, 397075097220 + ... + 397075097273.

It is an arithmetic number, because the mean of its divisors is an integer number (3970750972470).

Almost surely, 2^{21442055251311} is an apocalyptic number.

21442055251311 is a deficient number, since it is larger than the sum of its proper divisors (10323952528449).

21442055251311 is an equidigital number, since it uses as much as digits as its factorization.

21442055251311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794150194502 (or 794150194496 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 21442055251311 in words is "twenty-one trillion, four hundred forty-two billion, fifty-five million, two hundred fifty-one thousand, three hundred eleven".