161220910090102 has 32 divisors (see below), whose sum is σ = 245908193082624. Its totient is φ = 79252729526400.

The previous prime is 161220910090063. The next prime is 161220910090139. The reversal of 161220910090102 is 201090019022161.

It is a congruent number.

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, 2528011488 + ... + 2528075260.

It is an arithmetic number, because the mean of its divisors is an integer number (7684631033832).

Almost surely, 2^{161220910090102} is an apocalyptic number.

161220910090102 is a deficient number, since it is larger than the sum of its proper divisors (84687282992522).

161220910090102 is a wasteful number, since it uses less digits than its factorization.

161220910090102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72984.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 161220910090102 in words is "one hundred sixty-one trillion, two hundred twenty billion, nine hundred ten million, ninety thousand, one hundred two".