1261383020132 has 12 divisors (see below), whose sum is σ = 2210800719036. Its totient is φ = 629725671840.

The previous prime is 1261383020129. The next prime is 1261383020237. The reversal of 1261383020132 is 2310203831621.

It can be written as a sum of positive squares in 2 ways, for example, as 522185445376 + 739197574756 = 722624^2 + 859766^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241456619 + ... + 241461842.

It is an arithmetic number, because the mean of its divisors is an integer number (184233393253).

Almost surely, 2^{1261383020132} is an apocalyptic number.

It is an amenable number.

1261383020132 is a deficient number, since it is larger than the sum of its proper divisors (949417698904).

1261383020132 is a wasteful number, since it uses less digits than its factorization.

1261383020132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482919118 (or 482919116 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 1261383020132 its reverse (2310203831621), we get a palindrome (3571586851753).

The spelling of 1261383020132 in words is "one trillion, two hundred sixty-one billion, three hundred eighty-three million, twenty thousand, one hundred thirty-two".