261121013324 has 6 divisors (see below), whose sum is σ = 456961773324. Its totient is φ = 130560506660.

The previous prime is 261121013291. The next prime is 261121013339. The reversal of 261121013324 is 423310121162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261121013293 and 261121013302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640126662 + ... + 32640126669.

It is an arithmetic number, because the mean of its divisors is an integer number (76160295554).

Almost surely, 2^261121013324 is an apocalyptic number.

It is an amenable number.

261121013324 is a deficient number, since it is larger than the sum of its proper divisors (195840760000).

261121013324 is a wasteful number, since it uses less digits than its factorization.

261121013324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65280253335 (or 65280253333 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 261121013324 its reverse (423310121162), we get a palindrome (684431134486).

The spelling of 261121013324 in words is "two hundred sixty-one billion, one hundred twenty-one million, thirteen thousand, three hundred twenty-four".