235734721421 has 4 divisors (see below), whose sum is σ = 236007879552. Its totient is φ = 235461563292.

The previous prime is 235734721379. The next prime is 235734721433. The reversal of 235734721421 is 124127437532.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235734721421 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 (235734721441) 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, 136577771 + ... + 136579496.

It is an arithmetic number, because the mean of its divisors is an integer number (59001969888).

Almost surely, 2^235734721421 is an apocalyptic number.

It is an amenable number.

235734721421 is a deficient number, since it is larger than the sum of its proper divisors (273158131).

235734721421 is an equidigital number, since it uses as much as digits as its factorization.

235734721421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273158130.

The product of its digits is 282240, while the sum is 41.

The spelling of 235734721421 in words is "two hundred thirty-five billion, seven hundred thirty-four million, seven hundred twenty-one thousand, four hundred twenty-one".