1213223031 has 24 divisors (see below), whose sum is σ = 1784624400. Its totient is φ = 794094336.

The previous prime is 1213223029. The next prime is 1213223047. The reversal of 1213223031 is 1303223121.

It is not a de Polignac number, because 1213223031 - 2¹ = 1213223029 is a prime.

It is a super-2 number, since 2×1213223031² = 2943820245897653922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213222995 and 1213223013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213223731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103245 + ... + 114393.

It is an arithmetic number, because the mean of its divisors is an integer number (74359350).

Almost surely, 2^1213223031 is an apocalyptic number.

1213223031 is a deficient number, since it is larger than the sum of its proper divisors (571401369).

1213223031 is a wasteful number, since it uses less digits than its factorization.

1213223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375 (or 11372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213223031 is about 34831.3512657778. The cubic root of 1213223031 is about 1066.5475326690.

Adding to 1213223031 its reverse (1303223121), we get a palindrome (2516446152).

The spelling of 1213223031 in words is "one billion, two hundred thirteen million, two hundred twenty-three thousand, thirty-one".