2211021000091 has 2 divisors, whose sum is σ = 2211021000092. Its totient is φ = 2211021000090.

The previous prime is 2211020999959. The next prime is 2211021000143. The reversal of 2211021000091 is 1900001201122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211021000091 is a prime.

It is a super-2 number, since 2×2211021000091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211021000491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105510500045 + 1105510500046.

It is an arithmetic number, because the mean of its divisors is an integer number (1105510500046).

Almost surely, 2^{2211021000091} is an apocalyptic number.

2211021000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211021000091 is an equidigital number, since it uses as much as digits as its factorization.

2211021000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2211021000091 in words is "two trillion, two hundred eleven billion, twenty-one million, ninety-one", and thus it is an aban number.