1213761225552 has 20 divisors (see below), whose sum is σ = 3135549832800. Its totient is φ = 404587075168.

The previous prime is 1213761225517. The next prime is 1213761225631. The reversal of 1213761225552 is 2555221673121.

It is a happy number.

It is a congruent number.

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, 12643346052 + ... + 12643346147.

It is an arithmetic number, because the mean of its divisors is an integer number (156777491640).

Almost surely, 2^{1213761225552} is an apocalyptic number.

1213761225552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213761225552 is an abundant number, since it is smaller than the sum of its proper divisors (1921788607248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213761225552 is a wasteful number, since it uses less digits than its factorization.

1213761225552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25286692210 (or 25286692204 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

Adding to 1213761225552 its reverse (2555221673121), we get a palindrome (3768982898673).

The spelling of 1213761225552 in words is "one trillion, two hundred thirteen billion, seven hundred sixty-one million, two hundred twenty-five thousand, five hundred fifty-two".