221031323011020 has 96 divisors (see below), whose sum is σ = 655517518504128. Its totient is φ = 55455509716992.

The previous prime is 221031323011007. The next prime is 221031323011049. The reversal of 221031323011020 is 20110323130122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34168537 + ... + 40119216.

It is an arithmetic number, because the mean of its divisors is an integer number (6828307484418).

Almost surely, 2^{221031323011020} is an apocalyptic number.

221031323011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221031323011020 is an abundant number, since it is smaller than the sum of its proper divisors (434486195493108).

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

221031323011020 is a wasteful number, since it uses less digits than its factorization.

221031323011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74290699 (or 74290697 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221031323011020 its reverse (20110323130122), we get a palindrome (241141646141142).

The spelling of 221031323011020 in words is "two hundred twenty-one trillion, thirty-one billion, three hundred twenty-three million, eleven thousand, twenty".