1265242221700 has 72 divisors (see below), whose sum is σ = 2764709297280. Its totient is φ = 502577731200.

The previous prime is 1265242221611. The next prime is 1265242221767. The reversal of 1265242221700 is 71222425621.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13072485 + ... + 13168915.

It is an arithmetic number, because the mean of its divisors is an integer number (38398740240).

Almost surely, 2^{1265242221700} is an apocalyptic number.

1265242221700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265242221700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382354648640).

1265242221700 is an abundant number, since it is smaller than the sum of its proper divisors (1499467075580).

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

1265242221700 is a wasteful number, since it uses less digits than its factorization.

1265242221700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97357 (or 97350 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 1265242221700 in words is "one trillion, two hundred sixty-five billion, two hundred forty-two million, two hundred twenty-one thousand, seven hundred".