2120202261 has 24 divisors (see below), whose sum is σ = 3216071040. Its totient is φ = 1343380896.

The previous prime is 2120202239. The next prime is 2120202283. The reversal of 2120202261 is 1622020212.

It is an interprime number because it is at equal distance from previous prime (2120202239) and next prime (2120202283).

It is not a de Polignac number, because 2120202261 - 2¹¹ = 2120200213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120202361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121 + ... + 65118.

It is an arithmetic number, because the mean of its divisors is an integer number (134002960).

Almost surely, 2^2120202261 is an apocalyptic number.

It is an amenable number.

2120202261 is a deficient number, since it is larger than the sum of its proper divisors (1095868779).

2120202261 is a wasteful number, since it uses less digits than its factorization.

2120202261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65425 (or 65422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2120202261 is about 46045.6540946048. The cubic root of 2120202261 is about 1284.6725103258.

Adding to 2120202261 its reverse (1622020212), we get a palindrome (3742222473).

The spelling of 2120202261 in words is "two billion, one hundred twenty million, two hundred two thousand, two hundred sixty-one".