21331241532402 has 16 divisors (see below), whose sum is σ = 44907876910560. Its totient is φ = 6736181536512.

The previous prime is 21331241532319. The next prime is 21331241532413. The reversal of 21331241532402 is 20423514213312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93558076783 + ... + 93558077010.

It is an arithmetic number, because the mean of its divisors is an integer number (2806742306910).

Almost surely, 2^{21331241532402} is an apocalyptic number.

21331241532402 is an abundant number, since it is smaller than the sum of its proper divisors (23576635378158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21331241532402 is a wasteful number, since it uses less digits than its factorization.

21331241532402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187116153817.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21331241532402 its reverse (20423514213312), we get a palindrome (41754755745714).

The spelling of 21331241532402 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred forty-one million, five hundred thirty-two thousand, four hundred two".