234121445021 has 4 divisors (see below), whose sum is σ = 234122432700. Its totient is φ = 234120457344.

The previous prime is 234121445017. The next prime is 234121445029. The reversal of 234121445021 is 120544121432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 124689496996 + 109431948025 = 353114^2 + 330805^2 .

It is a cyclic number.

It is not a de Polignac number, because 234121445021 - 2² = 234121445017 is a prime.

It is a super-2 number, since 2×234121445021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234121445029) 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, 98765 + ... + 691373.

It is an arithmetic number, because the mean of its divisors is an integer number (58530608175).

Almost surely, 2^234121445021 is an apocalyptic number.

It is an amenable number.

234121445021 is a deficient number, since it is larger than the sum of its proper divisors (987679).

234121445021 is an equidigital number, since it uses as much as digits as its factorization.

234121445021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987678.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 234121445021 its reverse (120544121432), we get a palindrome (354665566453).

The spelling of 234121445021 in words is "two hundred thirty-four billion, one hundred twenty-one million, four hundred forty-five thousand, twenty-one".