2122111260261 has 32 divisors (see below), whose sum is σ = 3329321212800. Its totient is φ = 1331313096960.

The previous prime is 2122111260259. The next prime is 2122111260263. The reversal of 2122111260261 is 1620621112212.

It is a happy number.

2122111260261 is a `hidden beast` number, since 21 + 2 + 21 + 1 + 12 + 602 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2122111260259) and next prime (2122111260263).

It is not a de Polignac number, because 2122111260261 - 2¹ = 2122111260259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122111260263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2611926 + ... + 3326616.

It is an arithmetic number, because the mean of its divisors is an integer number (104041287900).

Almost surely, 2^{2122111260261} is an apocalyptic number.

It is an amenable number.

2122111260261 is a deficient number, since it is larger than the sum of its proper divisors (1207209952539).

2122111260261 is a wasteful number, since it uses less digits than its factorization.

2122111260261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721186 (or 721180 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

Adding to 2122111260261 its reverse (1620621112212), we get a palindrome (3742732372473).

The spelling of 2122111260261 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, two hundred sixty thousand, two hundred sixty-one".