1020020051 has 4 divisors (see below), whose sum is σ = 1026517152. Its totient is φ = 1013522952.

The previous prime is 1020020047. The next prime is 1020020083. The reversal of 1020020051 is 1500200201.

1020020051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1500200201 = 1237 ⋅1212773.

It is a cyclic number.

It is not a de Polignac number, because 1020020051 - 2² = 1020020047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020020041) 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, 3248315 + ... + 3248628.

It is an arithmetic number, because the mean of its divisors is an integer number (256629288).

Almost surely, 2^1020020051 is an apocalyptic number.

1020020051 is a deficient number, since it is larger than the sum of its proper divisors (6497101).

1020020051 is an equidigital number, since it uses as much as digits as its factorization.

1020020051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497100.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1020020051 is about 31937.7527543815. The cubic root of 1020020051 is about 1006.6293055273.

Adding to 1020020051 its reverse (1500200201), we get a palindrome (2520220252).

The spelling of 1020020051 in words is "one billion, twenty million, twenty thousand, fifty-one".