1321211012 has 48 divisors (see below), whose sum is σ = 2559513600. Its totient is φ = 591763200.

The previous prime is 1321211009. The next prime is 1321211027. The reversal of 1321211012 is 2101121231.

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, 897437 + ... + 898907.

It is an arithmetic number, because the mean of its divisors is an integer number (53323200).

Almost surely, 2^1321211012 is an apocalyptic number.

It is an amenable number.

1321211012 is a deficient number, since it is larger than the sum of its proper divisors (1238302588).

1321211012 is a wasteful number, since it uses less digits than its factorization.

1321211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1321211012 is about 36348.4664325746. The cubic root of 1321211012 is about 1097.2966709077.

Adding to 1321211012 its reverse (2101121231), we get a palindrome (3422332243).

The spelling of 1321211012 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, twelve".