21133203242 has 16 divisors (see below), whose sum is σ = 31875584832. Its totient is φ = 10508166720.

The previous prime is 21133203211. The next prime is 21133203269. The reversal of 21133203242 is 24230233112.

It is a super-2 number, since 2×21133203242² (a number of 21 digits) contains 22 as substring.

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, 230093 + ... + 308559.

It is an arithmetic number, because the mean of its divisors is an integer number (1992224052).

Almost surely, 2^21133203242 is an apocalyptic number.

21133203242 is a deficient number, since it is larger than the sum of its proper divisors (10742381590).

21133203242 is a wasteful number, since it uses less digits than its factorization.

21133203242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79213.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21133203242 its reverse (24230233112), we get a palindrome (45363436354).

The spelling of 21133203242 in words is "twenty-one billion, one hundred thirty-three million, two hundred three thousand, two hundred forty-two".