1022111998 has 16 divisors (see below), whose sum is σ = 1538988624. Its totient is φ = 509120640.

The previous prime is 1022111971. The next prime is 1022111999. The reversal of 1022111998 is 8991112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022111999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045686 + ... + 1046662.

It is an arithmetic number, because the mean of its divisors is an integer number (96186789).

Almost surely, 2^1022111998 is an apocalyptic number.

1022111998 is a deficient number, since it is larger than the sum of its proper divisors (516876626).

1022111998 is an equidigital number, since it uses as much as digits as its factorization.

1022111998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its (nonzero) digits is 2592, while the sum is 34.

The square root of 1022111998 is about 31970.4863585151. The cubic root of 1022111998 is about 1007.3169969751.

The spelling of 1022111998 in words is "one billion, twenty-two million, one hundred eleven thousand, nine hundred ninety-eight".