1213122031 has 8 divisors (see below), whose sum is σ = 1326744144. Its totient is φ = 1100056320.

The previous prime is 1213122017. The next prime is 1213122059. The reversal of 1213122031 is 1302213121.

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

It is not a de Polignac number, because 1213122031 - 2⁵ = 1213121999 is a prime.

It is a super-2 number, since 2×1213122031² = 2943330124195129922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213121996 and 1213122014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213122931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134530 + ... + 143263.

It is an arithmetic number, because the mean of its divisors is an integer number (165843018).

Almost surely, 2^1213122031 is an apocalyptic number.

1213122031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213122031 is a deficient number, since it is larger than the sum of its proper divisors (113622113).

1213122031 is a wasteful number, since it uses less digits than its factorization.

1213122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278201.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1213122031 is about 34829.9013923382. The cubic root of 1213122031 is about 1066.5179353932.

Adding to 1213122031 its reverse (1302213121), we get a palindrome (2515335152).

The spelling of 1213122031 in words is "one billion, two hundred thirteen million, one hundred twenty-two thousand, thirty-one".