1122111988 has 6 divisors (see below), whose sum is σ = 1963695986. Its totient is φ = 561055992.

The previous prime is 1122111953. The next prime is 1122111989. The reversal of 1122111988 is 8891112211.

It can be written as a sum of positive squares in only one way, i.e., 1113690384 + 8421604 = 33372^2 + 2902^2 .

It is a super-2 number, since 2×1122111988² = 2518270627226624288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122111989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140263995 + ... + 140264002.

Almost surely, 2^1122111988 is an apocalyptic number.

It is an amenable number.

1122111988 is a deficient number, since it is larger than the sum of its proper divisors (841583998).

1122111988 is a wasteful number, since it uses less digits than its factorization.

1122111988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280528001 (or 280527999 counting only the distinct ones).

The product of its digits is 2304, while the sum is 34.

The square root of 1122111988 is about 33497.9400560691. The cubic root of 1122111988 is about 1039.1511774694.

The spelling of 1122111988 in words is "one billion, one hundred twenty-two million, one hundred eleven thousand, nine hundred eighty-eight".