261121119 has 16 divisors (see below), whose sum is σ = 398247168. Its totient is φ = 149081472.

The previous prime is 261121103. The next prime is 261121141. The reversal of 261121119 is 911121162.

It is a happy number.

It is not a de Polignac number, because 261121119 - 2⁴ = 261121103 is a prime.

It is a super-2 number, since 2×261121119² = 136368477575624322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261121019) 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, 22444 + ... + 32030.

It is an arithmetic number, because the mean of its divisors is an integer number (24890448).

Almost surely, 2^261121119 is an apocalyptic number.

261121119 is a deficient number, since it is larger than the sum of its proper divisors (137126049).

261121119 is a wasteful number, since it uses less digits than its factorization.

261121119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10894.

The product of its digits is 216, while the sum is 24.

The square root of 261121119 is about 16159.2425255641. The cubic root of 261121119 is about 639.1664922588.

The spelling of 261121119 in words is "two hundred sixty-one million, one hundred twenty-one thousand, one hundred nineteen".