1212045131 has 8 divisors (see below), whose sum is σ = 1391822400. Its totient is φ = 1043866440.

The previous prime is 1212045127. The next prime is 1212045151. The reversal of 1212045131 is 1315402121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212045131 - 2² = 1212045127 is a prime.

It is a super-2 number, since 2×1212045131² = 2938106799161614322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212045151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2899421 + ... + 2899838.

It is an arithmetic number, because the mean of its divisors is an integer number (173977800).

Almost surely, 2^1212045131 is an apocalyptic number.

1212045131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212045131 is a deficient number, since it is larger than the sum of its proper divisors (179777269).

1212045131 is a wasteful number, since it uses less digits than its factorization.

1212045131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799289.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1212045131 is about 34814.4385420762. The cubic root of 1212045131 is about 1066.2022559156.

Adding to 1212045131 its reverse (1315402121), we get a palindrome (2527447252).

The spelling of 1212045131 in words is "one billion, two hundred twelve million, forty-five thousand, one hundred thirty-one".