1522002440021 has 8 divisors (see below), whose sum is σ = 1739565544704. Its totient is φ = 1304472881520.

The previous prime is 1522002440017. The next prime is 1522002440027. The reversal of 1522002440021 is 1200442002251.

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 1522002440021 - 2² = 1522002440017 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 (1522002440027) 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, 8289245 + ... + 8470866.

It is an arithmetic number, because the mean of its divisors is an integer number (217445693088).

Almost surely, 2^{1522002440021} is an apocalyptic number.

It is an amenable number.

1522002440021 is a deficient number, since it is larger than the sum of its proper divisors (217563104683).

1522002440021 is a wasteful number, since it uses less digits than its factorization.

1522002440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773091.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 1522002440021 its reverse (1200442002251), we get a palindrome (2722444442272).

The spelling of 1522002440021 in words is "one trillion, five hundred twenty-two billion, two million, four hundred forty thousand, twenty-one".