2021130251 has 8 divisors (see below), whose sum is σ = 2310139104. Its totient is φ = 1732190400.

The previous prime is 2021130227. The next prime is 2021130257. The reversal of 2021130251 is 1520311202.

It is a happy number.

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 2021130251 - 2¹⁸ = 2020868107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021130257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89951 + ... + 110151.

It is an arithmetic number, because the mean of its divisors is an integer number (288767388).

Almost surely, 2^2021130251 is an apocalyptic number.

2021130251 is a deficient number, since it is larger than the sum of its proper divisors (289008853).

2021130251 is a wasteful number, since it uses less digits than its factorization.

2021130251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34501.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2021130251 is about 44956.9822274583. The cubic root of 2021130251 is about 1264.3425895585.

Adding to 2021130251 its reverse (1520311202), we get a palindrome (3541441453).

The spelling of 2021130251 in words is "two billion, twenty-one million, one hundred thirty thousand, two hundred fifty-one".