22002451515221 has 16 divisors (see below), whose sum is σ = 23909230563840. Its totient is φ = 20170640424960.

The previous prime is 22002451515119. The next prime is 22002451515257. The reversal of 22002451515221 is 12251515420022.

It is not a de Polignac number, because 22002451515221 - 2¹⁴ = 22002451498837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002451515721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7342421 + ... + 9895253.

It is an arithmetic number, because the mean of its divisors is an integer number (1494326910240).

Almost surely, 2^{22002451515221} is an apocalyptic number.

It is an amenable number.

22002451515221 is a deficient number, since it is larger than the sum of its proper divisors (1906779048619).

22002451515221 is a wasteful number, since it uses less digits than its factorization.

22002451515221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567516.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 22002451515221 its reverse (12251515420022), we get a palindrome (34253966935243).

The spelling of 22002451515221 in words is "twenty-two trillion, two billion, four hundred fifty-one million, five hundred fifteen thousand, two hundred twenty-one".