261104420212 has 24 divisors (see below), whose sum is σ = 466680098304. Its totient is φ = 127767551712.

The previous prime is 261104420209. The next prime is 261104420249. The reversal of 261104420212 is 212024401162.

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, 5912598 + ... + 5956594.

It is an arithmetic number, because the mean of its divisors is an integer number (19445004096).

Almost surely, 2^261104420212 is an apocalyptic number.

It is an amenable number.

261104420212 is a deficient number, since it is larger than the sum of its proper divisors (205575678092).

261104420212 is a wasteful number, since it uses less digits than its factorization.

261104420212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75615 (or 75613 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 261104420212 its reverse (212024401162), we get a palindrome (473128821374).

The spelling of 261104420212 in words is "two hundred sixty-one billion, one hundred four million, four hundred twenty thousand, two hundred twelve".