2120052781 has 16 divisors (see below), whose sum is σ = 2646171648. Its totient is φ = 1650121200.

The previous prime is 2120052763. The next prime is 2120052799. The reversal of 2120052781 is 1872500212.

It is an interprime number because it is at equal distance from previous prime (2120052763) and next prime (2120052799).

It is not a de Polignac number, because 2120052781 - 2¹⁹ = 2119528493 is a prime.

It is a super-2 number, since 2×2120052781² = 8989247588451667922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120052481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55036 + ... + 85258.

It is an arithmetic number, because the mean of its divisors is an integer number (165385728).

Almost surely, 2^2120052781 is an apocalyptic number.

It is an amenable number.

2120052781 is a deficient number, since it is larger than the sum of its proper divisors (526118867).

2120052781 is a wasteful number, since it uses less digits than its factorization.

2120052781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31152.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 2120052781 is about 46044.0308943516. The cubic root of 2120052781 is about 1284.6423186529.

Adding to 2120052781 its reverse (1872500212), we get a palindrome (3992552993).

The spelling of 2120052781 in words is "two billion, one hundred twenty million, fifty-two thousand, seven hundred eighty-one".