146221431022231 has 4 divisors (see below), whose sum is σ = 148280887797264. Its totient is φ = 144161974247200.

The previous prime is 146221431022229. The next prime is 146221431022259. The reversal of 146221431022231 is 132220134122641.

146221431022231 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 not a de Polignac number, because 146221431022231 - 2¹ = 146221431022229 is a prime.

It is a super-2 number, since 2×146221431022231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146221431022201) 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, 1029728387410 + ... + 1029728387551.

It is an arithmetic number, because the mean of its divisors is an integer number (37070221949316).

Almost surely, 2^{146221431022231} is an apocalyptic number.

146221431022231 is a deficient number, since it is larger than the sum of its proper divisors (2059456775033).

146221431022231 is an equidigital number, since it uses as much as digits as its factorization.

146221431022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059456775032.

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 146221431022231 its reverse (132220134122641), we get a palindrome (278441565144872).

The spelling of 146221431022231 in words is "one hundred forty-six trillion, two hundred twenty-one billion, four hundred thirty-one million, twenty-two thousand, two hundred thirty-one".