21133022331 has 8 divisors (see below), whose sum is σ = 28776881664. Its totient is φ = 13788922280.

The previous prime is 21133022279. The next prime is 21133022353. The reversal of 21133022331 is 13322033112.

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

It is a cyclic number.

It is not a de Polignac number, because 21133022331 - 2¹⁷ = 21132891259 is a prime.

It is a super-2 number, since 2×21133022331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133022298 and 21133022307.

It is not an unprimeable number, because it can be changed into a prime (21133022381) 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, 74939655 + ... + 74939936.

It is an arithmetic number, because the mean of its divisors is an integer number (3597110208).

Almost surely, 2^21133022331 is an apocalyptic number.

21133022331 is a deficient number, since it is larger than the sum of its proper divisors (7643859333).

21133022331 is a wasteful number, since it uses less digits than its factorization.

21133022331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149879641.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21133022331 its reverse (13322033112), we get a palindrome (34455055443).

The spelling of 21133022331 in words is "twenty-one billion, one hundred thirty-three million, twenty-two thousand, three hundred thirty-one".