20333132121 has 4 divisors (see below), whose sum is σ = 27110842832. Its totient is φ = 13555421412.

The previous prime is 20333132077. The next prime is 20333132167. The reversal of 20333132121 is 12123133302.

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 not a de Polignac number, because 20333132121 - 2¹⁰ = 20333131097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20333132021) 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, 3388855351 + ... + 3388855356.

It is an arithmetic number, because the mean of its divisors is an integer number (6777710708).

Almost surely, 2^20333132121 is an apocalyptic number.

It is an amenable number.

20333132121 is a deficient number, since it is larger than the sum of its proper divisors (6777710711).

20333132121 is an equidigital number, since it uses as much as digits as its factorization.

20333132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6777710710.

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

Adding to 20333132121 its reverse (12123133302), we get a palindrome (32456265423).

The spelling of 20333132121 in words is "twenty billion, three hundred thirty-three million, one hundred thirty-two thousand, one hundred twenty-one".