2321542842921 has 27 divisors (see below), whose sum is σ = 3380004888663. Its totient is φ = 1535484609360.

The previous prime is 2321542842907. The next prime is 2321542842947. The reversal of 2321542842921 is 1292482451232.

The square root of 2321542842921 is 1523661.

It is a perfect power (a square), and thus also a powerful number.

2321542842921 is a `hidden beast` number, since 2 + 3 + 2 + 1 + 542 + 84 + 2 + 9 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 590307939225 + 1731234903696 = 768315^2 + 1315764^2 .

It is not a de Polignac number, because 2321542842921 - 2³¹ = 2319395359273 is a prime.

It is a super-2 number, since 2×2321542842921² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2321542842121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 598796835 + ... + 598800711.

Almost surely, 2^{2321542842921} is an apocalyptic number.

2321542842921 is the 1523661-st square number.

2321542842921 is the 761831-st centered octagonal number.

It is an amenable number.

2321542842921 is a deficient number, since it is larger than the sum of its proper divisors (1058462045742).

2321542842921 is an frugal number, since it uses more digits than its factorization.

2321542842921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022 (or 4011 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 2321542842921 in words is "two trillion, three hundred twenty-one billion, five hundred forty-two million, eight hundred forty-two thousand, nine hundred twenty-one".