21133222031 has 8 divisors (see below), whose sum is σ = 21740526864. Its totient is φ = 20527819200.

The previous prime is 21133222013. The next prime is 21133222051. The reversal of 21133222031 is 13022233112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21133222031 is a prime.

It is a super-2 number, since 2×21133222031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133221994 and 21133222012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133222051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452945 + ... + 497418.

It is an arithmetic number, because the mean of its divisors is an integer number (2717565858).

Almost surely, 2^21133222031 is an apocalyptic number.

21133222031 is a deficient number, since it is larger than the sum of its proper divisors (607304833).

21133222031 is an equidigital number, since it uses as much as digits as its factorization.

21133222031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951001.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21133222031 its reverse (13022233112), we get a palindrome (34155455143).

The spelling of 21133222031 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty-two thousand, thirty-one".