1331211051 has 8 divisors (see below), whose sum is σ = 1972164560. Its totient is φ = 887474016.

The previous prime is 1331211031. The next prime is 1331211073. The reversal of 1331211051 is 1501121331.

It is not a de Polignac number, because 1331211051 - 2⁵ = 1331211019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331211031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24652030 + ... + 24652083.

It is an arithmetic number, because the mean of its divisors is an integer number (246520570).

Almost surely, 2^1331211051 is an apocalyptic number.

1331211051 is a deficient number, since it is larger than the sum of its proper divisors (640953509).

1331211051 is an equidigital number, since it uses as much as digits as its factorization.

1331211051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49304122 (or 49304116 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1331211051 is about 36485.7650461108. The cubic root of 1331211051 is about 1100.0581376986.

Adding to 1331211051 its reverse (1501121331), we get a palindrome (2832332382).

The spelling of 1331211051 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, fifty-one".