102561215042 has 32 divisors (see below), whose sum is σ = 180756442944. Its totient is φ = 43028107200.

The previous prime is 102561215027. The next prime is 102561215063. The reversal of 102561215042 is 240512165201.

It is a junction number, because it is equal to n+sod(n) for n = 102561214996 and 102561215014.

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, 4859192 + ... + 4880252.

It is an arithmetic number, because the mean of its divisors is an integer number (5648638842).

Almost surely, 2^102561215042 is an apocalyptic number.

102561215042 is a deficient number, since it is larger than the sum of its proper divisors (78195227902).

102561215042 is a wasteful number, since it uses less digits than its factorization.

102561215042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38114.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 102561215042 in words is "one hundred two billion, five hundred sixty-one million, two hundred fifteen thousand, forty-two".