1321211213300 has 72 divisors (see below), whose sum is σ = 3152294906880. Its totient is φ = 476657395200.

The previous prime is 1321211213269. The next prime is 1321211213321. The reversal of 1321211213300 is 33121121231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4589045 + ... + 4868444.

Almost surely, 2^{1321211213300} is an apocalyptic number.

1321211213300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321211213300 is an abundant number, since it is smaller than the sum of its proper divisors (1831083693580).

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

1321211213300 is a wasteful number, since it uses less digits than its factorization.

1321211213300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457641 (or 9457634 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321211213300 its reverse (33121121231), we get a palindrome (1354332334531).

The spelling of 1321211213300 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, three hundred".