1211101198 has 16 divisors (see below), whose sum is σ = 1881281376. Its totient is φ = 584382240.

The previous prime is 1211101187. The next prime is 1211101237. The reversal of 1211101198 is 8911011121.

It is a super-2 number, since 2×1211101198² = 2933532223594070408, which contains 22 as substring.

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, 87186 + ... + 100117.

It is an arithmetic number, because the mean of its divisors is an integer number (117580086).

Almost surely, 2^1211101198 is an apocalyptic number.

1211101198 is a deficient number, since it is larger than the sum of its proper divisors (670180178).

1211101198 is a wasteful number, since it uses less digits than its factorization.

1211101198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187419.

The product of its (nonzero) digits is 144, while the sum is 25.

The square root of 1211101198 is about 34800.8792705012. The cubic root of 1211101198 is about 1065.9254001983.

The spelling of 1211101198 in words is "one billion, two hundred eleven million, one hundred one thousand, one hundred ninety-eight".