1321211402 has 48 divisors (see below), whose sum is σ = 2423494080. Its totient is φ = 537590592.

The previous prime is 1321211399. The next prime is 1321211431. The reversal of 1321211402 is 2041121231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311198 + ... + 315414.

It is an arithmetic number, because the mean of its divisors is an integer number (50489460).

Almost surely, 2^1321211402 is an apocalyptic number.

1321211402 is a deficient number, since it is larger than the sum of its proper divisors (1102282678).

1321211402 is a wasteful number, since it uses less digits than its factorization.

1321211402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1321211402 is about 36348.4717973122. The cubic root of 1321211402 is about 1097.2967788757.

Adding to 1321211402 its reverse (2041121231), we get a palindrome (3362332633).

The spelling of 1321211402 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, four hundred two".