21445031555122 has 16 divisors (see below), whose sum is σ = 36763723563840. Its totient is φ = 9190524727728.

The previous prime is 21445031555119. The next prime is 21445031555177. The reversal of 21445031555122 is 22155513054412.

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, 16266372 + ... + 17535247.

It is an arithmetic number, because the mean of its divisors is an integer number (2297732722740).

Almost surely, 2^{21445031555122} is an apocalyptic number.

21445031555122 is a deficient number, since it is larger than the sum of its proper divisors (15318692008718).

21445031555122 is a wasteful number, since it uses less digits than its factorization.

21445031555122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33846945.

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

The spelling of 21445031555122 in words is "twenty-one trillion, four hundred forty-five billion, thirty-one million, five hundred fifty-five thousand, one hundred twenty-two".