1010021231 has 4 divisors (see below), whose sum is σ = 1010087232. Its totient is φ = 1009955232.

The previous prime is 1010021213. The next prime is 1010021267. The reversal of 1010021231 is 1321200101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010021231 is a prime.

It is a super-2 number, since 2×1010021231² = 2040285774141510722, which 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 (1010021431) 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, 3170 + ... + 45056.

It is an arithmetic number, because the mean of its divisors is an integer number (252521808).

Almost surely, 2^1010021231 is an apocalyptic number.

1010021231 is a deficient number, since it is larger than the sum of its proper divisors (66001).

1010021231 is an equidigital number, since it uses as much as digits as its factorization.

1010021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66000.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1010021231 is about 31780.8311879976. The cubic root of 1010021231 is about 1003.3293137025.

Adding to 1010021231 its reverse (1321200101), we get a palindrome (2331221332).

The spelling of 1010021231 in words is "one billion, ten million, twenty-one thousand, two hundred thirty-one".