1247244525221 has 8 divisors (see below), whose sum is σ = 1342261225944. Its totient is φ = 1154633310720.

The previous prime is 1247244525217. The next prime is 1247244525223. The reversal of 1247244525221 is 1225254427421.

It can be written as a sum of positive squares in 4 ways, for example, as 226661688100 + 1020582837121 = 476090^2 + 1010239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247244525221 - 2² = 1247244525217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247244525223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601370480 + ... + 601372553.

It is an arithmetic number, because the mean of its divisors is an integer number (167782653243).

Almost surely, 2^{1247244525221} is an apocalyptic number.

It is an amenable number.

1247244525221 is a deficient number, since it is larger than the sum of its proper divisors (95016700723).

1247244525221 is a wasteful number, since it uses less digits than its factorization.

1247244525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202743111.

The product of its digits is 358400, while the sum is 41.

The spelling of 1247244525221 in words is "one trillion, two hundred forty-seven billion, two hundred forty-four million, five hundred twenty-five thousand, two hundred twenty-one".