21231133042 has 16 divisors (see below), whose sum is σ = 36404911872. Its totient is φ = 9096886080.

The previous prime is 21231133039. The next prime is 21231133051. The reversal of 21231133042 is 24033113212.

It is a super-2 number, since 2×21231133042² (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, 119418 + ... + 238165.

It is an arithmetic number, because the mean of its divisors is an integer number (2275306992).

Almost surely, 2^21231133042 is an apocalyptic number.

21231133042 is a deficient number, since it is larger than the sum of its proper divisors (15173778830).

21231133042 is a wasteful number, since it uses less digits than its factorization.

21231133042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361833.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21231133042 its reverse (24033113212), we get a palindrome (45264246254).

The spelling of 21231133042 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty-three thousand, forty-two".