990111001022 has 16 divisors (see below), whose sum is σ = 1744810995312. Its totient is φ = 415431189120.

The previous prime is 990111001007. The next prime is 990111001051. The reversal of 990111001022 is 220100111099.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 990111000982 and 990111001000.

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, 1730963003 + ... + 1730963574.

It is an arithmetic number, because the mean of its divisors is an integer number (109050687207).

Almost surely, 2^990111001022 is an apocalyptic number.

990111001022 is a deficient number, since it is larger than the sum of its proper divisors (754699994290).

990111001022 is a wasteful number, since it uses less digits than its factorization.

990111001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461926603.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 990111001022 in words is "nine hundred ninety billion, one hundred eleven million, one thousand, twenty-two".