221001023131 has 8 divisors (see below), whose sum is σ = 252584457984. Its totient is φ = 189420553320.

The previous prime is 221001023119. The next prime is 221001023167. The reversal of 221001023131 is 131320100122.

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 221001023131 - 2⁷ = 221001023003 is a prime.

It is a super-2 number, since 2×221001023131² (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 (221001023101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579175 + ... + 881728.

It is an arithmetic number, because the mean of its divisors is an integer number (31573057248).

Almost surely, 2^221001023131 is an apocalyptic number.

221001023131 is a deficient number, since it is larger than the sum of its proper divisors (31583434853).

221001023131 is a wasteful number, since it uses less digits than its factorization.

221001023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482521.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221001023131 its reverse (131320100122), we get a palindrome (352321123253).

The spelling of 221001023131 in words is "two hundred twenty-one billion, one million, twenty-three thousand, one hundred thirty-one".