234221545122421 has 2 divisors, whose sum is σ = 234221545122422. Its totient is φ = 234221545122420.

The previous prime is 234221545122419. The next prime is 234221545122503. The reversal of 234221545122421 is 124221545122432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201080511041796 + 33141034080625 = 14180286^2 + 5756825^2 .

It is a cyclic number.

It is not a de Polignac number, because 234221545122421 - 2¹ = 234221545122419 is a prime.

Together with 234221545122419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234221545122401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117110772561210 + 117110772561211.

It is an arithmetic number, because the mean of its divisors is an integer number (117110772561211).

Almost surely, 2^{234221545122421} is an apocalyptic number.

It is an amenable number.

234221545122421 is a deficient number, since it is larger than the sum of its proper divisors (1).

234221545122421 is an equidigital number, since it uses as much as digits as its factorization.

234221545122421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 307200, while the sum is 40.

The spelling of 234221545122421 in words is "two hundred thirty-four trillion, two hundred twenty-one billion, five hundred forty-five million, one hundred twenty-two thousand, four hundred twenty-one".