2150221021 has 8 divisors (see below), whose sum is σ = 2315987744. Its totient is φ = 1984506480.

The previous prime is 2150221009. The next prime is 2150221027. The reversal of 2150221021 is 1201220512.

It is a happy number.

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 2150221021 - 2¹⁵ = 2150188253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2150220986 and 2150221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133990 + ... + 149176.

It is an arithmetic number, because the mean of its divisors is an integer number (289498468).

Almost surely, 2^2150221021 is an apocalyptic number.

It is an amenable number.

2150221021 is a deficient number, since it is larger than the sum of its proper divisors (165766723).

2150221021 is a wasteful number, since it uses less digits than its factorization.

2150221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26091.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2150221021 is about 46370.4757469664. The cubic root of 2150221021 is about 1290.7071060734.

Adding to 2150221021 its reverse (1201220512), we get a palindrome (3351441533).

The spelling of 2150221021 in words is "two billion, one hundred fifty million, two hundred twenty-one thousand, twenty-one".