105221912445712 has 40 divisors (see below), whose sum is σ = 208842044425560. Its totient is φ = 51327218488320.

The previous prime is 105221912445709. The next prime is 105221912445763. The reversal of 105221912445712 is 217544219122501.

It can be written as a sum of positive squares in 4 ways, for example, as 1110418567696 + 104111493878016 = 1053764^2 + 10203504^2 .

It is a super-2 number, since 2×105221912445712² (a number of 29 digits) contains 22 as substring.

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, 65019114 + ... + 66617782.

It is an arithmetic number, because the mean of its divisors is an integer number (5221051110639).

Almost surely, 2^{105221912445712} is an apocalyptic number.

It is an amenable number.

105221912445712 is a deficient number, since it is larger than the sum of its proper divisors (103620131979848).

105221912445712 is a wasteful number, since it uses less digits than its factorization.

105221912445712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699051 (or 1699045 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 105221912445712 in words is "one hundred five trillion, two hundred twenty-one billion, nine hundred twelve million, four hundred forty-five thousand, seven hundred twelve".