3123241000021 has 4 divisors (see below), whose sum is σ = 3123358560972. Its totient is φ = 3123123439072.

The previous prime is 3123240999841. The next prime is 3123241000027. The reversal of 3123241000021 is 1200001423213.

It is a happy number.

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 2613916131121 + 509324868900 = 1616761^2 + 713670^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123241000021 - 2¹¹ = 3123240997973 is a prime.

It is a super-2 number, since 2×3123241000021² (a number of 26 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 (3123241000027) 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, 58740616 + ... + 58793761.

It is an arithmetic number, because the mean of its divisors is an integer number (780839640243).

Almost surely, 2^{3123241000021} is an apocalyptic number.

It is an amenable number.

3123241000021 is a deficient number, since it is larger than the sum of its proper divisors (117560951).

3123241000021 is a wasteful number, since it uses less digits than its factorization.

3123241000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117560950.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 3123241000021 its reverse (1200001423213), we get a palindrome (4323242423234).

The spelling of 3123241000021 in words is "three trillion, one hundred twenty-three billion, two hundred forty-one million, twenty-one", and thus it is an aban number.