1110022100021 has 2 divisors, whose sum is σ = 1110022100022. Its totient is φ = 1110022100020.

The previous prime is 1110022100017. The next prime is 1110022100023. The reversal of 1110022100021 is 1200012200111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104968880625 + 5053219396 = 1051175^2 + 71086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110022100021 - 2² = 1110022100017 is a prime.

Together with 1110022100023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1110022099975 and 1110022100011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110022100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555011050010 + 555011050011.

It is an arithmetic number, because the mean of its divisors is an integer number (555011050011).

Almost surely, 2^{1110022100021} is an apocalyptic number.

It is an amenable number.

1110022100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110022100021 is an equidigital number, since it uses as much as digits as its factorization.

1110022100021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1110022100021 its reverse (1200012200111), we get a palindrome (2310034300132).

The spelling of 1110022100021 in words is "one trillion, one hundred ten billion, twenty-two million, one hundred thousand, twenty-one".