234423742221 has 16 divisors (see below), whose sum is σ = 347303145600. Its totient is φ = 156278574144.

The previous prime is 234423742213. The next prime is 234423742247. The reversal of 234423742221 is 122247324432.

234423742221 is a `hidden beast` number, since 2 + 3 + 4 + 423 + 7 + 4 + 2 + 221 = 666.

It is not a de Polignac number, because 234423742221 - 2³ = 234423742213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234423749221) 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, 1335640 + ... + 1500926.

It is an arithmetic number, because the mean of its divisors is an integer number (21706446600).

Almost surely, 2^234423742221 is an apocalyptic number.

It is an amenable number.

234423742221 is a deficient number, since it is larger than the sum of its proper divisors (112879403379).

234423742221 is a wasteful number, since it uses less digits than its factorization.

234423742221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217825 (or 217819 counting only the distinct ones).

The product of its digits is 129024, while the sum is 36.

The spelling of 234423742221 in words is "two hundred thirty-four billion, four hundred twenty-three million, seven hundred forty-two thousand, two hundred twenty-one".