235044721021 has 16 divisors (see below), whose sum is σ = 261283734720. Its totient is φ = 209618622720.

The previous prime is 235044721019. The next prime is 235044721061. The reversal of 235044721021 is 120127440532.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 235044721021 - 2¹ = 235044721019 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 (235044721061) 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, 5600965 + ... + 5642773.

It is an arithmetic number, because the mean of its divisors is an integer number (16330233420).

Almost surely, 2^235044721021 is an apocalyptic number.

It is an amenable number.

235044721021 is a deficient number, since it is larger than the sum of its proper divisors (26239013699).

235044721021 is a wasteful number, since it uses less digits than its factorization.

235044721021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51516.

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 235044721021 in words is "two hundred thirty-five billion, forty-four million, seven hundred twenty-one thousand, twenty-one".