221232401031 has 16 divisors (see below), whose sum is σ = 297810463104. Its totient is φ = 146072017824.

The previous prime is 221232401029. The next prime is 221232401051. The reversal of 221232401031 is 130104232122.

It is not a de Polignac number, because 221232401031 - 2¹ = 221232401029 is a prime.

It is a super-2 number, since 2×221232401031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221232400989 and 221232401007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232401011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179681 + ... + 1354293.

It is an arithmetic number, because the mean of its divisors is an integer number (18613153944).

Almost surely, 2^221232401031 is an apocalyptic number.

221232401031 is a deficient number, since it is larger than the sum of its proper divisors (76578062073).

221232401031 is a wasteful number, since it uses less digits than its factorization.

221232401031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178670.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221232401031 its reverse (130104232122), we get a palindrome (351336633153).

The spelling of 221232401031 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred one thousand, thirty-one".