1213404051 has 12 divisors (see below), whose sum is σ = 1675587992. Its totient is φ = 781040064.

The previous prime is 1213404043. The next prime is 1213404067. The reversal of 1213404051 is 1504043121.

It is not a de Polignac number, because 1213404051 - 2³ = 1213404043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213404151) 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 11 ways as a sum of consecutive naturals, for example, 237946 + ... + 242991.

Almost surely, 2^1213404051 is an apocalyptic number.

1213404051 is a deficient number, since it is larger than the sum of its proper divisors (462183941).

1213404051 is an equidigital number, since it uses as much as digits as its factorization.

1213404051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480998 (or 480969 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1213404051 is about 34833.9496899218. The cubic root of 1213404051 is about 1066.6005750825.

Adding to 1213404051 its reverse (1504043121), we get a palindrome (2717447172).

The spelling of 1213404051 in words is "one billion, two hundred thirteen million, four hundred four thousand, fifty-one".