20121131051 has 8 divisors (see below), whose sum is σ = 23020023264. Its totient is φ = 17228350080.

The previous prime is 20121130999. The next prime is 20121131053. The reversal of 20121131051 is 15013112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121131051 - 2¹⁰ = 20121130027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121131053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1520750 + ... + 1533923.

It is an arithmetic number, because the mean of its divisors is an integer number (2877502908).

Almost surely, 2^20121131051 is an apocalyptic number.

20121131051 is a deficient number, since it is larger than the sum of its proper divisors (2898892213).

20121131051 is an equidigital number, since it uses as much as digits as its factorization.

20121131051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055621.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 20121131051 its reverse (15013112102), we get a palindrome (35134243153).

The spelling of 20121131051 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, fifty-one".