1311201402 has 32 divisors (see below), whose sum is σ = 3070134144. Its totient is φ = 365491200.

The previous prime is 1311201391. The next prime is 1311201431. The reversal of 1311201402 is 2041021131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378999 + ... + 382442.

It is an arithmetic number, because the mean of its divisors is an integer number (95941692).

Almost surely, 2^1311201402 is an apocalyptic number.

1311201402 is an abundant number, since it is smaller than the sum of its proper divisors (1758932742).

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

1311201402 is a wasteful number, since it uses less digits than its factorization.

1311201402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761494.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1311201402 is about 36210.5150750442. The cubic root of 1311201402 is about 1094.5185715439.

Adding to 1311201402 its reverse (2041021131), we get a palindrome (3352222533).

The spelling of 1311201402 in words is "one billion, three hundred eleven million, two hundred one thousand, four hundred two".