1099557212 has 24 divisors (see below), whose sum is σ = 2194140816. Its totient is φ = 477635328.

The previous prime is 1099557209. The next prime is 1099557233. The reversal of 1099557212 is 2127559901.

It is a super-2 number, since 2×1099557212² = 2418052124922425888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1099557212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621038 + ... + 622805.

It is an arithmetic number, because the mean of its divisors is an integer number (91422534).

Almost surely, 2^1099557212 is an apocalyptic number.

It is an amenable number.

1099557212 is a deficient number, since it is larger than the sum of its proper divisors (1094583604).

1099557212 is a wasteful number, since it uses less digits than its factorization.

1099557212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243877 (or 1243875 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 1099557212 is about 33159.5719513989. The cubic root of 1099557212 is about 1032.1415873982.

The spelling of 1099557212 in words is "one billion, ninety-nine million, five hundred fifty-seven thousand, two hundred twelve".