1212110131 has 4 divisors (see below), whose sum is σ = 1212180264. Its totient is φ = 1212040000.

The previous prime is 1212110087. The next prime is 1212110153. The reversal of 1212110131 is 1310112121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1310112121 = 677 ⋅1935173.

It is a cyclic number.

It is not a de Polignac number, because 1212110131 - 2²³ = 1203721523 is a prime.

It is a super-2 number, since 2×1212110131² = 2938421939345674322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212113131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11256 + ... + 50506.

It is an arithmetic number, because the mean of its divisors is an integer number (303045066).

Almost surely, 2^1212110131 is an apocalyptic number.

1212110131 is a deficient number, since it is larger than the sum of its proper divisors (70133).

1212110131 is an equidigital number, since it uses as much as digits as its factorization.

1212110131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70132.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1212110131 is about 34815.3720502884. The cubic root of 1212110131 is about 1066.2213151365.

Adding to 1212110131 its reverse (1310112121), we get a palindrome (2522222252).

The spelling of 1212110131 in words is "one billion, two hundred twelve million, one hundred ten thousand, one hundred thirty-one".