91220102 has 16 divisors (see below), whose sum is σ = 146752560. Its totient is φ = 42393312.

The previous prime is 91220057. The next prime is 91220117. The reversal of 91220102 is 20102219.

It is a super-2 number, since 2×91220102² = 16642214017780808, which contains 22 as substring.

It is a congruent number.

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, 20633 + ... + 24660.

It is an arithmetic number, because the mean of its divisors is an integer number (9172035).

Almost surely, 2^91220102 is an apocalyptic number.

91220102 is a deficient number, since it is larger than the sum of its proper divisors (55532458).

91220102 is a wasteful number, since it uses less digits than its factorization.

91220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45367.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 91220102 is about 9550.9215262193. The cubic root of 91220102 is about 450.1564920740.

The spelling of 91220102 in words is "ninety-one million, two hundred twenty thousand, one hundred two".