1261213352264 has 16 divisors (see below), whose sum is σ = 2404855969200. Its totient is φ = 619918427152.

The previous prime is 1261213352233. The next prime is 1261213352279. The reversal of 1261213352264 is 4622533121621.

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, 1336030622 + ... + 1336031565.

It is an arithmetic number, because the mean of its divisors is an integer number (150303498075).

Almost surely, 2^{1261213352264} is an apocalyptic number.

It is an amenable number.

1261213352264 is a deficient number, since it is larger than the sum of its proper divisors (1143642616936).

1261213352264 is a wasteful number, since it uses less digits than its factorization.

1261213352264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672062252 (or 2672062248 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

Adding to 1261213352264 its reverse (4622533121621), we get a palindrome (5883746473885).

The spelling of 1261213352264 in words is "one trillion, two hundred sixty-one billion, two hundred thirteen million, three hundred fifty-two thousand, two hundred sixty-four".