1250345421221 has 4 divisors (see below), whose sum is σ = 1346525838252. Its totient is φ = 1154165004192.

The previous prime is 1250345421197. The next prime is 1250345421287. The reversal of 1250345421221 is 1221245430521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 557187602500 + 693157818721 = 746450^2 + 832561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250345421221 - 2¹⁰ = 1250345420197 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 (1250345426221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48090208496 + ... + 48090208521.

It is an arithmetic number, because the mean of its divisors is an integer number (336631459563).

Almost surely, 2^{1250345421221} is an apocalyptic number.

It is an amenable number.

1250345421221 is a deficient number, since it is larger than the sum of its proper divisors (96180417031).

1250345421221 is an equidigital number, since it uses as much as digits as its factorization.

1250345421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96180417030.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 1250345421221 in words is "one trillion, two hundred fifty billion, three hundred forty-five million, four hundred twenty-one thousand, two hundred twenty-one".