2031220511 has 4 divisors (see below), whose sum is σ = 2031345672. Its totient is φ = 2031095352.

The previous prime is 2031220453. The next prime is 2031220519. The reversal of 2031220511 is 1150221302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1150221302 = 2 ⋅575110651.

It is a cyclic number.

It is not a de Polignac number, because 2031220511 - 2⁶ = 2031220447 is a prime.

It is a super-2 number, since 2×2031220511² = 8251713528614202242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031220511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031220519) 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 3 ways as a sum of consecutive naturals, for example, 33836 + ... + 72161.

It is an arithmetic number, because the mean of its divisors is an integer number (507836418).

Almost surely, 2^2031220511 is an apocalyptic number.

2031220511 is a deficient number, since it is larger than the sum of its proper divisors (125161).

2031220511 is a wasteful number, since it uses less digits than its factorization.

2031220511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125160.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2031220511 is about 45069.0637910308. The cubic root of 2031220511 is about 1266.4431261184.

Adding to 2031220511 its reverse (1150221302), we get a palindrome (3181441813).

The spelling of 2031220511 in words is "two billion, thirty-one million, two hundred twenty thousand, five hundred eleven".