20121332051 has 4 divisors (see below), whose sum is σ = 20130210072. Its totient is φ = 20112454032.

The previous prime is 20121332041. The next prime is 20121332071. The reversal of 20121332051 is 15023312102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121332051 - 2³⁰ = 19047590227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121332041) 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, 4435610 + ... + 4440143.

It is an arithmetic number, because the mean of its divisors is an integer number (5032552518).

Almost surely, 2^20121332051 is an apocalyptic number.

20121332051 is a deficient number, since it is larger than the sum of its proper divisors (8878021).

20121332051 is an equidigital number, since it uses as much as digits as its factorization.

20121332051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878020.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20121332051 its reverse (15023312102), we get a palindrome (35144644153).

The spelling of 20121332051 in words is "twenty billion, one hundred twenty-one million, three hundred thirty-two thousand, fifty-one".