1245306536221 has 8 divisors (see below), whose sum is σ = 1360454198688. Its totient is φ = 1130481870000.

The previous prime is 1245306536129. The next prime is 1245306536233. The reversal of 1245306536221 is 1226356035421.

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 1245306536221 - 2²¹ = 1245304439069 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 (1245306546221) 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, 80740995 + ... + 80756416.

It is an arithmetic number, because the mean of its divisors is an integer number (170056774836).

Almost surely, 2^{1245306536221} is an apocalyptic number.

1245306536221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1245306536221 is a deficient number, since it is larger than the sum of its proper divisors (115147662467).

1245306536221 is a wasteful number, since it uses less digits than its factorization.

1245306536221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161498123.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 1245306536221 in words is "one trillion, two hundred forty-five billion, three hundred six million, five hundred thirty-six thousand, two hundred twenty-one".