21342002331 has 16 divisors (see below), whose sum is σ = 30989256480. Its totient is φ = 12985969920.

The previous prime is 21342002329. The next prime is 21342002369. The reversal of 21342002331 is 13320024312.

It is not a de Polignac number, because 21342002331 - 2¹ = 21342002329 is a prime.

It is a super-2 number, since 2×21342002331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21342002298 and 21342002307.

It is not an unprimeable number, because it can be changed into a prime (21342002321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3070860 + ... + 3077801.

It is an arithmetic number, because the mean of its divisors is an integer number (1936828530).

Almost surely, 2^21342002331 is an apocalyptic number.

21342002331 is a deficient number, since it is larger than the sum of its proper divisors (9647254149).

21342002331 is a wasteful number, since it uses less digits than its factorization.

21342002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148766.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21342002331 its reverse (13320024312), we get a palindrome (34662026643).

The spelling of 21342002331 in words is "twenty-one billion, three hundred forty-two million, two thousand, three hundred thirty-one".