1213131011 has 8 divisors (see below), whose sum is σ = 1242751680. Its totient is φ = 1183849128.

The previous prime is 1213130983. The next prime is 1213131041. The reversal of 1213131011 is 1101313121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213131011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213131041) 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 7 ways as a sum of consecutive naturals, for example, 77441 + ... + 91778.

It is an arithmetic number, because the mean of its divisors is an integer number (155343960).

Almost surely, 2^1213131011 is an apocalyptic number.

1213131011 is a deficient number, since it is larger than the sum of its proper divisors (29620669).

1213131011 is a wasteful number, since it uses less digits than its factorization.

1213131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169393.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1213131011 is about 34830.0303043222. The cubic root of 1213131011 is about 1066.5205669799.

Adding to 1213131011 its reverse (1101313121), we get a palindrome (2314444132).

The spelling of 1213131011 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, eleven".