1000021021211 has 4 divisors (see below), whose sum is σ = 1001447585424. Its totient is φ = 998594457000.

The previous prime is 1000021021199. The next prime is 1000021021229. The reversal of 1000021021211 is 1121201200001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000021021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000021021192 and 1000021021201.

It is not an unprimeable number, because it can be changed into a prime (1000021021261) 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, 713281055 + ... + 713282456.

It is an arithmetic number, because the mean of its divisors is an integer number (250361896356).

Almost surely, 2^{1000021021211} is an apocalyptic number.

1000021021211 is a deficient number, since it is larger than the sum of its proper divisors (1426564213).

1000021021211 is an equidigital number, since it uses as much as digits as its factorization.

1000021021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426564212.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1000021021211 its reverse (1121201200001), we get a palindrome (2121222221212).

The spelling of 1000021021211 in words is "one trillion, twenty-one million, twenty-one thousand, two hundred eleven".