1212120131 has 16 divisors (see below), whose sum is σ = 1257984000. Its totient is φ = 1167350688.

The previous prime is 1212120113. The next prime is 1212120137. The reversal of 1212120131 is 1310212121.

It is a cyclic number.

It is not a de Polignac number, because 1212120131 - 2¹⁰ = 1212119107 is a prime.

It is a super-2 number, since 2×1212120131² = 2938470423950914322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212120137) 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, 620945 + ... + 622893.

It is an arithmetic number, because the mean of its divisors is an integer number (78624000).

Almost surely, 2^1212120131 is an apocalyptic number.

1212120131 is a deficient number, since it is larger than the sum of its proper divisors (45863869).

1212120131 is a wasteful number, since it uses less digits than its factorization.

1212120131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1212120131 is about 34815.5156647148. The cubic root of 1212120131 is about 1066.2242472639.

Adding to 1212120131 its reverse (1310212121), we get a palindrome (2522332252).

The spelling of 1212120131 in words is "one billion, two hundred twelve million, one hundred twenty thousand, one hundred thirty-one".