1000021021111 has 16 divisors (see below), whose sum is σ = 1159054009344. Its totient is φ = 845098447104.

The previous prime is 1000021021093. The next prime is 1000021021117. The reversal of 1000021021111 is 1111201200001.

It is a cyclic number.

It is not a de Polignac number, because 1000021021111 - 2²⁵ = 999987466679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021021117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621395 + ... + 2978548.

It is an arithmetic number, because the mean of its divisors is an integer number (72440875584).

Almost surely, 2^{1000021021111} is an apocalyptic number.

1000021021111 is a deficient number, since it is larger than the sum of its proper divisors (159032988233).

1000021021111 is an equidigital number, since it uses as much as digits as its factorization.

1000021021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600310.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1000021021111 its reverse (1111201200001), we get a palindrome (2111222221112).

The spelling of 1000021021111 in words is "one trillion, twenty-one million, twenty-one thousand, one hundred eleven".