151234232221 has 4 divisors (see below), whose sum is σ = 151236543744. Its totient is φ = 151231920700.

The previous prime is 151234232207. The next prime is 151234232231. The reversal of 151234232221 is 122232432151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122232432151 = 1063 ⋅114988177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151234232221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151234232221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151234232231) 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, 1054675 + ... + 1189456.

It is an arithmetic number, because the mean of its divisors is an integer number (37809135936).

Almost surely, 2^151234232221 is an apocalyptic number.

It is an amenable number.

151234232221 is a deficient number, since it is larger than the sum of its proper divisors (2311523).

151234232221 is an equidigital number, since it uses as much as digits as its factorization.

151234232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311522.

The product of its digits is 5760, while the sum is 28.

Adding to 151234232221 its reverse (122232432151), we get a palindrome (273466664372).

The spelling of 151234232221 in words is "one hundred fifty-one billion, two hundred thirty-four million, two hundred thirty-two thousand, two hundred twenty-one".