1213131210 has 32 divisors (see below), whose sum is σ = 2990207232. Its totient is φ = 314758080.

The previous prime is 1213131197. The next prime is 1213131211. The reversal of 1213131210 is 121313121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1213131210.

It is not an unprimeable number, because it can be changed into a prime (1213131211) 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, 545346 + ... + 547565.

It is an arithmetic number, because the mean of its divisors is an integer number (93443976).

Almost surely, 2^1213131210 is an apocalyptic number.

1213131210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213131210 is an abundant number, since it is smaller than the sum of its proper divisors (1777076022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213131210 is a wasteful number, since it uses less digits than its factorization.

1213131210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092958.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1213131210 is about 34830.0331610523. The cubic root of 1213131210 is about 1066.5206252966.

Adding to 1213131210 its reverse (121313121), we get a palindrome (1334444331).

The spelling of 1213131210 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred ten".