1223211212300 has 72 divisors (see below), whose sum is σ = 3309342355200. Its totient is φ = 381260635200.

The previous prime is 1223211212273. The next prime is 1223211212303. The reversal of 1223211212300 is 32121123221.

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

It is not an unprimeable number, because it can be changed into a prime (1223211212303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79421600 + ... + 79436999.

Almost surely, 2^{1223211212300} is an apocalyptic number.

1223211212300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223211212300 is an abundant number, since it is smaller than the sum of its proper divisors (2086131142900).

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

1223211212300 is a wasteful number, since it uses less digits than its factorization.

1223211212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158858631 (or 158858624 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1223211212300 its reverse (32121123221), we get a palindrome (1255332335521).

The spelling of 1223211212300 in words is "one trillion, two hundred twenty-three billion, two hundred eleven million, two hundred twelve thousand, three hundred".