10021213231 has 4 divisors (see below), whose sum is σ = 10022053464. Its totient is φ = 10020373000.

The previous prime is 10021213217. The next prime is 10021213303. The reversal of 10021213231 is 13231212001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10021213231 - 2²⁹ = 9484342319 is a prime.

It is a super-2 number, since 2×10021213231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021213331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401965 + ... + 426166.

It is an arithmetic number, because the mean of its divisors is an integer number (2505513366).

Almost surely, 2^10021213231 is an apocalyptic number.

10021213231 is a deficient number, since it is larger than the sum of its proper divisors (840233).

10021213231 is an equidigital number, since it uses as much as digits as its factorization.

10021213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840232.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10021213231 its reverse (13231212001), we get a palindrome (23252425232).

The spelling of 10021213231 in words is "ten billion, twenty-one million, two hundred thirteen thousand, two hundred thirty-one".