2031201221 has 8 divisors (see below), whose sum is σ = 2331600960. Its totient is φ = 1733358528.

The previous prime is 2031201217. The next prime is 2031201229. The reversal of 2031201221 is 1221021302.

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 2031201221 - 2² = 2031201217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031201196 and 2031201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031201229) 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, 637556 + ... + 640733.

It is an arithmetic number, because the mean of its divisors is an integer number (291450120).

Almost surely, 2^2031201221 is an apocalyptic number.

It is an amenable number.

2031201221 is a deficient number, since it is larger than the sum of its proper divisors (300399739).

2031201221 is a wasteful number, since it uses less digits than its factorization.

2031201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278523.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2031201221 is about 45068.8497856335. The cubic root of 2031201221 is about 1266.4391170730.

Adding to 2031201221 its reverse (1221021302), we get a palindrome (3252222523).

The spelling of 2031201221 in words is "two billion, thirty-one million, two hundred one thousand, two hundred twenty-one".