261111135022 has 16 divisors (see below), whose sum is σ = 398517436800. Its totient is φ = 128274348600.

The previous prime is 261111135007. The next prime is 261111135037. The reversal of 261111135022 is 220531111162.

It is an interprime number because it is at equal distance from previous prime (261111135007) and next prime (261111135037).

It is a super-2 number, since 2×261111135022² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367104 + ... + 810547.

It is an arithmetic number, because the mean of its divisors is an integer number (24907339800).

Almost surely, 2^261111135022 is an apocalyptic number.

261111135022 is a deficient number, since it is larger than the sum of its proper divisors (137406301778).

261111135022 is a wasteful number, since it uses less digits than its factorization.

261111135022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179591.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 261111135022 its reverse (220531111162), we get a palindrome (481642246184).

The spelling of 261111135022 in words is "two hundred sixty-one billion, one hundred eleven million, one hundred thirty-five thousand, twenty-two".