1212110198 has 16 divisors (see below), whose sum is σ = 1959051696. Its totient is φ = 559141920.

The previous prime is 1212110197. The next prime is 1212110203. The reversal of 1212110198 is 8910112121.

It is a super-2 number, since 2×1212110198² = 2938422264191198408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212110197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42968 + ... + 65348.

It is an arithmetic number, because the mean of its divisors is an integer number (122440731).

Almost surely, 2^1212110198 is an apocalyptic number.

1212110198 is a deficient number, since it is larger than the sum of its proper divisors (746941498).

1212110198 is a wasteful number, since it uses less digits than its factorization.

1212110198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24479.

The product of its (nonzero) digits is 288, while the sum is 26.

The square root of 1212110198 is about 34815.3730125070. The cubic root of 1212110198 is about 1066.2213347818.

The spelling of 1212110198 in words is "one billion, two hundred twelve million, one hundred ten thousand, one hundred ninety-eight".