1022123091 has 16 divisors (see below), whose sum is σ = 1488953088. Its totient is φ = 618540000.

The previous prime is 1022123087. The next prime is 1022123099. The reversal of 1022123091 is 1903212201.

It is not a de Polignac number, because 1022123091 - 2² = 1022123087 is a prime.

It is a super-2 number, since 2×1022123091² = 2089471226310788562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1022123099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535 + ... + 45216.

It is an arithmetic number, because the mean of its divisors is an integer number (93059568).

Almost surely, 2^1022123091 is an apocalyptic number.

1022123091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1022123091 is a deficient number, since it is larger than the sum of its proper divisors (466829997).

1022123091 is a wasteful number, since it uses less digits than its factorization.

1022123091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46442.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1022123091 is about 31970.6598461777. The cubic root of 1022123091 is about 1007.3206411051.

Adding to 1022123091 its reverse (1903212201), we get a palindrome (2925335292).

The spelling of 1022123091 in words is "one billion, twenty-two million, one hundred twenty-three thousand, ninety-one".