2031011221 has 8 divisors (see below), whose sum is σ = 2132064000. Its totient is φ = 1932179520.

The previous prime is 2031011209. The next prime is 2031011231. The reversal of 2031011221 is 1221101302.

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 2031011221 - 2⁷ = 2031011093 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 (2031011231) 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, 553396 + ... + 557053.

It is an arithmetic number, because the mean of its divisors is an integer number (266508000).

Almost surely, 2^2031011221 is an apocalyptic number.

It is an amenable number.

2031011221 is a deficient number, since it is larger than the sum of its proper divisors (101052779).

2031011221 is a wasteful number, since it uses less digits than its factorization.

2031011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110539.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2031011221 is about 45066.7418502825. The cubic root of 2031011221 is about 1266.3996279712.

Adding to 2031011221 its reverse (1221101302), we get a palindrome (3252112523).

The spelling of 2031011221 in words is "two billion, thirty-one million, eleven thousand, two hundred twenty-one".