91021021120022 has 16 divisors (see below), whose sum is σ = 158173516155552. Its totient is φ = 38474639064000.

The previous prime is 91021021120019. The next prime is 91021021120063. The reversal of 91021021120022 is 22002112012019.

It is a super-4 number, since 4×91021021120022⁴ (a number of 57 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91021021120022.

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, 44530831229 + ... + 44530833272.

It is an arithmetic number, because the mean of its divisors is an integer number (9885844759722).

Almost surely, 2^{91021021120022} is an apocalyptic number.

91021021120022 is a deficient number, since it is larger than the sum of its proper divisors (67152495035530).

91021021120022 is a wasteful number, since it uses less digits than its factorization.

91021021120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89061664583.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 91021021120022 in words is "ninety-one trillion, twenty-one billion, twenty-one million, one hundred twenty thousand, twenty-two".