1021601050225 has 36 divisors (see below), whose sum is σ = 1560290212044. Its totient is φ = 659318983680.

The previous prime is 1021601050199. The next prime is 1021601050243. The reversal of 1021601050225 is 5220501061201.

It can be written as a sum of positive squares in 6 ways, for example, as 73113996816 + 948487053409 = 270396^2 + 973903^2 .

It is not a de Polignac number, because 1021601050225 - 2⁵ = 1021601050193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021601050225.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24507412 + ... + 24549061.

It is an arithmetic number, because the mean of its divisors is an integer number (43341394779).

Almost surely, 2^{1021601050225} is an apocalyptic number.

It is an amenable number.

1021601050225 is a deficient number, since it is larger than the sum of its proper divisors (538689161819).

1021601050225 is a wasteful number, since it uses less digits than its factorization.

1021601050225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49056514 (or 49056502 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 1021601050225 in words is "one trillion, twenty-one billion, six hundred one million, fifty thousand, two hundred twenty-five".