3101220261 has 12 divisors (see below), whose sum is σ = 4715305920. Its totient is φ = 1958665320.

The previous prime is 3101220259. The next prime is 3101220277. The reversal of 3101220261 is 1620221013.

It is not a de Polignac number, because 3101220261 - 2¹ = 3101220259 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 (3101220211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9067725 + ... + 9068066.

It is an arithmetic number, because the mean of its divisors is an integer number (392942160).

Almost surely, 2^3101220261 is an apocalyptic number.

It is an amenable number.

3101220261 is a deficient number, since it is larger than the sum of its proper divisors (1614085659).

3101220261 is a wasteful number, since it uses less digits than its factorization.

3101220261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18135816 (or 18135813 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3101220261 is about 55688.6008174025. The cubic root of 3101220261 is about 1458.2910292497.

Adding to 3101220261 its reverse (1620221013), we get a palindrome (4721441274).

The spelling of 3101220261 in words is "three billion, one hundred one million, two hundred twenty thousand, two hundred sixty-one".