20133211121 has 4 divisors (see below), whose sum is σ = 20134374000. Its totient is φ = 20132048244.

The previous prime is 20133211097. The next prime is 20133211123. The reversal of 20133211121 is 12111233102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20133211121 - 2¹⁴ = 20133194737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20133211121.

It is not an unprimeable number, because it can be changed into a prime (20133211123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555071 + ... + 590228.

It is an arithmetic number, because the mean of its divisors is an integer number (5033593500).

Almost surely, 2^20133211121 is an apocalyptic number.

It is an amenable number.

20133211121 is a deficient number, since it is larger than the sum of its proper divisors (1162879).

20133211121 is a wasteful number, since it uses less digits than its factorization.

20133211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162878.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20133211121 its reverse (12111233102), we get a palindrome (32244444223).

The spelling of 20133211121 in words is "twenty billion, one hundred thirty-three million, two hundred eleven thousand, one hundred twenty-one".