1121781702025 has 48 divisors (see below), whose sum is σ = 1413963808560. Its totient is φ = 882745344000.

The previous prime is 1121781702011. The next prime is 1121781702061. The reversal of 1121781702025 is 5202071871211.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 515551284361 + 606230417664 = 718019^2 + 778608^2 .

It is not a de Polignac number, because 1121781702025 - 2¹¹ = 1121781699977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 598921489 + ... + 598923361.

It is an arithmetic number, because the mean of its divisors is an integer number (29457579345).

Almost surely, 2^{1121781702025} is an apocalyptic number.

It is an amenable number.

1121781702025 is a deficient number, since it is larger than the sum of its proper divisors (292182106535).

1121781702025 is a wasteful number, since it uses less digits than its factorization.

1121781702025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 37.

The spelling of 1121781702025 in words is "one trillion, one hundred twenty-one billion, seven hundred eighty-one million, seven hundred two thousand, twenty-five".