21012022233 has 24 divisors (see below), whose sum is σ = 32385768480. Its totient is φ = 13088952000.

The previous prime is 21012022201. The next prime is 21012022243. The reversal of 21012022233 is 33222021012.

It is not a de Polignac number, because 21012022233 - 2⁵ = 21012022201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012022243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 829143 + ... + 854108.

It is an arithmetic number, because the mean of its divisors is an integer number (1349407020).

Almost surely, 2^21012022233 is an apocalyptic number.

It is an amenable number.

21012022233 is a deficient number, since it is larger than the sum of its proper divisors (11373746247).

21012022233 is a wasteful number, since it uses less digits than its factorization.

21012022233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683349 (or 1683346 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21012022233 its reverse (33222021012), we get a palindrome (54234043245).

The spelling of 21012022233 in words is "twenty-one billion, twelve million, twenty-two thousand, two hundred thirty-three".