1213142031 has 6 divisors (see below), whose sum is σ = 1752316280. Its totient is φ = 808761348.

The previous prime is 1213142023. The next prime is 1213142041. The reversal of 1213142031 is 1302413121.

1213142031 is a `hidden beast` number, since 1 + 213 + 1 + 420 + 31 = 666.

It is not a de Polignac number, because 1213142031 - 2³ = 1213142023 is a prime.

It is a super-2 number, since 2×1213142031² = 2943427174757609922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213141995 and 1213142013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213142041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67396771 + ... + 67396788.

Almost surely, 2^1213142031 is an apocalyptic number.

1213142031 is a deficient number, since it is larger than the sum of its proper divisors (539174249).

1213142031 is a wasteful number, since it uses less digits than its factorization.

1213142031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134793565 (or 134793562 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213142031 is about 34830.1885007819. The cubic root of 1213142031 is about 1066.5237963703.

Adding to 1213142031 its reverse (1302413121), we get a palindrome (2515555152).

The spelling of 1213142031 in words is "one billion, two hundred thirteen million, one hundred forty-two thousand, thirty-one".