15120022010221 has 4 divisors (see below), whose sum is σ = 15607764655744. Its totient is φ = 14632279364700.

The previous prime is 15120022010101. The next prime is 15120022010273. The reversal of 15120022010221 is 12201022002151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15120022010221 - 2¹⁵ = 15120021977453 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 (15120022310221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243871322715 + ... + 243871322776.

It is an arithmetic number, because the mean of its divisors is an integer number (3901941163936).

Almost surely, 2^{15120022010221} is an apocalyptic number.

It is an amenable number.

15120022010221 is a deficient number, since it is larger than the sum of its proper divisors (487742645523).

15120022010221 is an equidigital number, since it uses as much as digits as its factorization.

15120022010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487742645522.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 15120022010221 its reverse (12201022002151), we get a palindrome (27321044012372).

The spelling of 15120022010221 in words is "fifteen trillion, one hundred twenty billion, twenty-two million, ten thousand, two hundred twenty-one".