221012020331 has 8 divisors (see below), whose sum is σ = 222998169744. Its totient is φ = 219026402560.

The previous prime is 221012020319. The next prime is 221012020351. The reversal of 221012020331 is 133020210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221012020331 - 2²² = 221007826027 is a prime.

It is a super-2 number, since 2×221012020331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012020351) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 727136 + ... + 985266.

It is an arithmetic number, because the mean of its divisors is an integer number (27874771218).

Almost surely, 2^221012020331 is an apocalyptic number.

221012020331 is a deficient number, since it is larger than the sum of its proper divisors (1986149413).

221012020331 is a wasteful number, since it uses less digits than its factorization.

221012020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265821.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221012020331 its reverse (133020210122), we get a palindrome (354032230453).

The spelling of 221012020331 in words is "two hundred twenty-one billion, twelve million, twenty thousand, three hundred thirty-one".