91112021102 has 16 divisors (see below), whose sum is σ = 138713323392. Its totient is φ = 44877411000.

The previous prime is 91112020973. The next prime is 91112021153. The reversal of 91112021102 is 20112021119.

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, 733274 + ... + 848477.

It is an arithmetic number, because the mean of its divisors is an integer number (8669582712).

Almost surely, 2^91112021102 is an apocalyptic number.

91112021102 is a deficient number, since it is larger than the sum of its proper divisors (47601302290).

91112021102 is a wasteful number, since it uses less digits than its factorization.

91112021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582183.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 91112021102 in words is "ninety-one billion, one hundred twelve million, twenty-one thousand, one hundred two".