1111100099621 has 2 divisors, whose sum is σ = 1111100099622. Its totient is φ = 1111100099620.

The previous prime is 1111100099569. The next prime is 1111100099623. The reversal of 1111100099621 is 1269900011111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037759877025 + 73340222596 = 1018705^2 + 270814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111100099621 - 2²⁶ = 1111032990757 is a prime.

It is a super-2 number, since 2×1111100099621² (a number of 25 digits) contains 22 as substring.

Together with 1111100099623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111100099623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555550049810 + 555550049811.

It is an arithmetic number, because the mean of its divisors is an integer number (555550049811).

Almost surely, 2^{1111100099621} is an apocalyptic number.

It is an amenable number.

1111100099621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111100099621 is an equidigital number, since it uses as much as digits as its factorization.

1111100099621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 32.

The spelling of 1111100099621 in words is "one trillion, one hundred eleven billion, one hundred million, ninety-nine thousand, six hundred twenty-one".