11231202021 has 16 divisors (see below), whose sum is σ = 16321158336. Its totient is φ = 6828235776.

The previous prime is 11231202019. The next prime is 11231202061. The reversal of 11231202021 is 12020213211.

It is not a de Polignac number, because 11231202021 - 2¹ = 11231202019 is a prime.

It is a super-2 number, since 2×11231202021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231202011) 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 15 ways as a sum of consecutive naturals, for example, 1731580 + ... + 1738053.

It is an arithmetic number, because the mean of its divisors is an integer number (1020072396).

Almost surely, 2^11231202021 is an apocalyptic number.

It is an amenable number.

11231202021 is a deficient number, since it is larger than the sum of its proper divisors (5089956315).

11231202021 is a wasteful number, since it uses less digits than its factorization.

11231202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3469732.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11231202021 its reverse (12020213211), we get a palindrome (23251415232).

The spelling of 11231202021 in words is "eleven billion, two hundred thirty-one million, two hundred two thousand, twenty-one".