1225510715021 has 8 divisors (see below), whose sum is σ = 1236909541560. Its totient is φ = 1214114717952.

The previous prime is 1225510714997. The next prime is 1225510715057. The reversal of 1225510715021 is 1205170155221.

It can be written as a sum of positive squares in 4 ways, for example, as 3577236100 + 1221933478921 = 59810^2 + 1105411^2 .

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 1225510715021 - 2¹⁴ = 1225510698637 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 (1225510711021) 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, 167921 + ... + 1574553.

It is an arithmetic number, because the mean of its divisors is an integer number (154613692695).

Almost surely, 2^{1225510715021} is an apocalyptic number.

It is an amenable number.

1225510715021 is a deficient number, since it is larger than the sum of its proper divisors (11398826539).

1225510715021 is a wasteful number, since it uses less digits than its factorization.

1225510715021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414735.

The product of its (nonzero) digits is 7000, while the sum is 32.

The spelling of 1225510715021 in words is "one trillion, two hundred twenty-five billion, five hundred ten million, seven hundred fifteen thousand, twenty-one".