1000021000231 has 4 divisors (see below), whose sum is σ = 1090932000264. Its totient is φ = 909110000200.

The previous prime is 1000021000219. The next prime is 1000021000241. The reversal of 1000021000231 is 1320001200001.

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 1000021000231 - 2⁷ = 1000021000103 is a prime.

It is a super-2 number, since 2×1000021000231² (a number of 25 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 (1000021000241) 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, 45455500000 + ... + 45455500021.

It is an arithmetic number, because the mean of its divisors is an integer number (272733000066).

Almost surely, 2^{1000021000231} is an apocalyptic number.

1000021000231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000021000231 is a deficient number, since it is larger than the sum of its proper divisors (90911000033).

1000021000231 is an equidigital number, since it uses as much as digits as its factorization.

1000021000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90911000032.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 1000021000231 its reverse (1320001200001), we get a palindrome (2320022200232).

The spelling of 1000021000231 in words is "one trillion, twenty-one million, two hundred thirty-one", and thus it is an aban number.