1212151199 has 12 divisors (see below), whose sum is σ = 1390035312. Its totient is φ = 1035457920.

The previous prime is 1212151163. The next prime is 1212151223. The reversal of 1212151199 is 9911512121.

It is not a de Polignac number, because 1212151199 - 2⁸ = 1212150943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212151139) 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, 1240199 + ... + 1241175.

It is an arithmetic number, because the mean of its divisors is an integer number (115836276).

Almost surely, 2^1212151199 is an apocalyptic number.

1212151199 is a deficient number, since it is larger than the sum of its proper divisors (177884113).

1212151199 is an frugal number, since it uses more digits than its factorization.

1212151199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826 (or 1405 counting only the distinct ones).

The product of its digits is 1620, while the sum is 32.

The square root of 1212151199 is about 34815.9618422355. The cubic root of 1212151199 is about 1066.2333566943.

The spelling of 1212151199 in words is "one billion, two hundred twelve million, one hundred fifty-one thousand, one hundred ninety-nine".