21112452664842 has 32 divisors (see below), whose sum is σ = 52644037814784. Its totient is φ = 5483753938800.

The previous prime is 21112452664703. The next prime is 21112452664861. The reversal of 21112452664842 is 24846625421112.

It is a junction number, because it is equal to n+sod(n) for n = 21112452664791 and 21112452664800.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22848974284 + ... + 22848975207.

It is an arithmetic number, because the mean of its divisors is an integer number (1645126181712).

Almost surely, 2^{21112452664842} is an apocalyptic number.

21112452664842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112452664842 is an abundant number, since it is smaller than the sum of its proper divisors (31531585149942).

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

21112452664842 is a wasteful number, since it uses less digits than its factorization.

21112452664842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45697949514.

The product of its digits is 1474560, while the sum is 48.

The spelling of 21112452664842 in words is "twenty-one trillion, one hundred twelve billion, four hundred fifty-two million, six hundred sixty-four thousand, eight hundred forty-two".