221000311232300 has 72 divisors (see below), whose sum is σ = 483078813737520. Its totient is φ = 87753483417600.

The previous prime is 221000311232293. The next prime is 221000311232329. The reversal of 221000311232300 is 3232113000122.

It is a super-2 number, since 2×221000311232300² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1632026996 + ... + 1632162404.

Almost surely, 2^{221000311232300} is an apocalyptic number.

221000311232300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000311232300 is an abundant number, since it is smaller than the sum of its proper divisors (262078502505220).

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

221000311232300 is a wasteful number, since it uses less digits than its factorization.

221000311232300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254691 (or 254684 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221000311232300 its reverse (3232113000122), we get a palindrome (224232424232422).

The spelling of 221000311232300 in words is "two hundred twenty-one trillion, three hundred eleven million, two hundred thirty-two thousand, three hundred".