234218498021 has 4 divisors (see below), whose sum is σ = 234236969100. Its totient is φ = 234200026944.

The previous prime is 234218497993. The next prime is 234218498081. The reversal of 234218498021 is 120894812432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144046816225 + 90171681796 = 379535^2 + 300286^2 .

It is a cyclic number.

It is not a de Polignac number, because 234218498021 - 2²² = 234214303717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234218498081) 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, 9216506 + ... + 9241883.

It is an arithmetic number, because the mean of its divisors is an integer number (58559242275).

Almost surely, 2^234218498021 is an apocalyptic number.

It is an amenable number.

234218498021 is a deficient number, since it is larger than the sum of its proper divisors (18471079).

234218498021 is a wasteful number, since it uses less digits than its factorization.

234218498021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18471078.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 234218498021 in words is "two hundred thirty-four billion, two hundred eighteen million, four hundred ninety-eight thousand, twenty-one".