20211211233 has 16 divisors (see below), whose sum is σ = 30003537600. Its totient is φ = 13446689760.

The previous prime is 20211211219. The next prime is 20211211249. The reversal of 20211211233 is 33211211202.

It is not a de Polignac number, because 20211211233 - 2⁶ = 20211211169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749028 + ... + 775541.

It is an arithmetic number, because the mean of its divisors is an integer number (1875221100).

Almost surely, 2^20211211233 is an apocalyptic number.

It is an amenable number.

20211211233 is a deficient number, since it is larger than the sum of its proper divisors (9792326367).

20211211233 is a wasteful number, since it uses less digits than its factorization.

20211211233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525069 (or 1525063 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20211211233 its reverse (33211211202), we get a palindrome (53422422435).

The spelling of 20211211233 in words is "twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred thirty-three".