261121121162 has 32 divisors (see below), whose sum is σ = 431071027200. Its totient is φ = 117645430320.

The previous prime is 261121121077. The next prime is 261121121207.

It is a happy number.

261121121162 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1038023 + ... + 1264805.

It is an arithmetic number, because the mean of its divisors is an integer number (13470969600).

Almost surely, 2^261121121162 is an apocalyptic number.

261121121162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261121121162 is a deficient number, since it is larger than the sum of its proper divisors (169949906038).

261121121162 is a wasteful number, since it uses less digits than its factorization.

261121121162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227258.

The product of its digits is 576, while the sum is 26.

It can be divided in two parts, 261121 and 121162, that added together give a palindrome (382283).

The spelling of 261121121162 in words is "two hundred sixty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred sixty-two".