1122100398 has 32 divisors (see below), whose sum is σ = 2496211200. Its totient is φ = 373635288.

The previous prime is 1122100387. The next prime is 1122100403. The reversal of 1122100398 is 8930012211.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 42513 + ... + 63651.

It is an arithmetic number, because the mean of its divisors is an integer number (78006600).

Almost surely, 2^1122100398 is an apocalyptic number.

1122100398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1122100398 is an abundant number, since it is smaller than the sum of its proper divisors (1374110802).

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

1122100398 is a wasteful number, since it uses less digits than its factorization.

1122100398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22133 (or 22127 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1122100398 is about 33497.7670599101. The cubic root of 1122100398 is about 1039.1475997505.

The spelling of 1122100398 in words is "one billion, one hundred twenty-two million, one hundred thousand, three hundred ninety-eight".