1022111985 has 16 divisors (see below), whose sum is σ = 1640713536. Its totient is φ = 543348288.

The previous prime is 1022111971. The next prime is 1022111999. The reversal of 1022111985 is 5891112201.

It is an interprime number because it is at equal distance from previous prime (1022111971) and next prime (1022111999).

It is not a de Polignac number, because 1022111985 - 2⁶ = 1022111921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106374 + ... + 115583.

It is an arithmetic number, because the mean of its divisors is an integer number (102544596).

Almost surely, 2^1022111985 is an apocalyptic number.

1022111985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1022111985 is a deficient number, since it is larger than the sum of its proper divisors (618601551).

1022111985 is a wasteful number, since it uses less digits than its factorization.

1022111985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222272.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1022111985 is about 31970.4861552026. The cubic root of 1022111985 is about 1007.3169927044.

It can be divided in two parts, 102211 and 1985, that added together give a triangular number (104196 = T₄₅₆).

The spelling of 1022111985 in words is "one billion, twenty-two million, one hundred eleven thousand, nine hundred eighty-five".