1212103131 has 16 divisors (see below), whose sum is σ = 1708965888. Its totient is φ = 762926400.

The previous prime is 1212103127. The next prime is 1212103141. The reversal of 1212103131 is 1313012121.

It is a happy number.

It is not a de Polignac number, because 1212103131 - 2² = 1212103127 is a prime.

It is a super-2 number, since 2×1212103131² = 2938388000360006322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212103131.

It is not an unprimeable number, because it can be changed into a prime (1212103141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155131 + ... + 162756.

It is an arithmetic number, because the mean of its divisors is an integer number (106810368).

Almost surely, 2^1212103131 is an apocalyptic number.

1212103131 is a deficient number, since it is larger than the sum of its proper divisors (496862757).

1212103131 is a wasteful number, since it uses less digits than its factorization.

1212103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317962.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1212103131 is about 34815.2715198374. The cubic root of 1212103131 is about 1066.2192626378.

Adding to 1212103131 its reverse (1313012121), we get a palindrome (2525115252).

The spelling of 1212103131 in words is "one billion, two hundred twelve million, one hundred three thousand, one hundred thirty-one".