1122012100 has 36 divisors (see below), whose sum is σ = 2656111248. Its totient is φ = 408004000.

The previous prime is 1122012097. The next prime is 1122012103. The reversal of 1122012100 is 12102211.

It is an interprime number because it is at equal distance from previous prime (1122012097) and next prime (1122012103).

It is a super-2 number, since 2×1122012100² = 2517822305092820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1122012103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508906 + ... + 511105.

It is an arithmetic number, because the mean of its divisors is an integer number (73780868).

Almost surely, 2^1122012100 is an apocalyptic number.

1122012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122012100 is an abundant number, since it is smaller than the sum of its proper divisors (1534099148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1122012100 is a wasteful number, since it uses less digits than its factorization.

1122012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020036 (or 1020029 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1122012100 is about 33496.4490655353. The cubic root of 1122012100 is about 1039.1203422188.

Adding to 1122012100 its reverse (12102211), we get a palindrome (1134114311).

The spelling of 1122012100 in words is "one billion, one hundred twenty-two million, twelve thousand, one hundred".