152321866421 has 2 divisors, whose sum is σ = 152321866422. Its totient is φ = 152321866420.

The previous prime is 152321866381. The next prime is 152321866423. The reversal of 152321866421 is 124668123251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102163336900 + 50158529521 = 319630^2 + 223961^2 .

It is a cyclic number.

It is not a de Polignac number, because 152321866421 - 2³⁰ = 151248124597 is a prime.

Together with 152321866423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152321866423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76160933210 + 76160933211.

It is an arithmetic number, because the mean of its divisors is an integer number (76160933211).

Almost surely, 2^152321866421 is an apocalyptic number.

It is an amenable number.

152321866421 is a deficient number, since it is larger than the sum of its proper divisors (1).

152321866421 is an equidigital number, since it uses as much as digits as its factorization.

152321866421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

Adding to 152321866421 its reverse (124668123251), we get a palindrome (276989989672).

The spelling of 152321866421 in words is "one hundred fifty-two billion, three hundred twenty-one million, eight hundred sixty-six thousand, four hundred twenty-one".