221301231001031 has 4 divisors (see below), whose sum is σ = 221301298344912. Its totient is φ = 221301163657152.

The previous prime is 221301231001013. The next prime is 221301231001063. The reversal of 221301231001031 is 130100132103122.

It is a happy number.

221301231001031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221301231001031 is a prime.

It is a super-2 number, since 2×221301231001031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221301231000994 and 221301231001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221301251001031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28475411 + ... + 35404116.

It is an arithmetic number, because the mean of its divisors is an integer number (55325324586228).

Almost surely, 2^{221301231001031} is an apocalyptic number.

221301231001031 is a deficient number, since it is larger than the sum of its proper divisors (67343881).

221301231001031 is an equidigital number, since it uses as much as digits as its factorization.

221301231001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67343880.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221301231001031 its reverse (130100132103122), we get a palindrome (351401363104153).

The spelling of 221301231001031 in words is "two hundred twenty-one trillion, three hundred one billion, two hundred thirty-one million, one thousand, thirty-one".