1111001102021 has 2 divisors, whose sum is σ = 1111001102022. Its totient is φ = 1111001102020.

The previous prime is 1111001101999. The next prime is 1111001102023. The reversal of 1111001102021 is 1202011001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 942705064900 + 168296037121 = 970930^2 + 410239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111001102021 - 2³⁰ = 1109927360197 is a prime.

Together with 1111001102023, 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 = 1111001101993 and 1111001102011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111001102023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555500551010 + 555500551011.

It is an arithmetic number, because the mean of its divisors is an integer number (555500551011).

Almost surely, 2^{1111001102021} is an apocalyptic number.

It is an amenable number.

1111001102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111001102021 is an equidigital number, since it uses as much as digits as its factorization.

1111001102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111001102021 its reverse (1202011001111), we get a palindrome (2313012103132).

It can be divided in two parts, 111100 and 1102021, that added together give a palindrome (1213121).

The spelling of 1111001102021 in words is "one trillion, one hundred eleven billion, one million, one hundred two thousand, twenty-one".