1021110222091 has 2 divisors, whose sum is σ = 1021110222092. Its totient is φ = 1021110222090.

The previous prime is 1021110222079. The next prime is 1021110222133. The reversal of 1021110222091 is 1902220111201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021110222091 - 2³⁵ = 986750483723 is a prime.

It is a super-3 number, since 3×1021110222091³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1021110222061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510555111045 + 510555111046.

It is an arithmetic number, because the mean of its divisors is an integer number (510555111046).

Almost surely, 2^{1021110222091} is an apocalyptic number.

1021110222091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021110222091 is an equidigital number, since it uses as much as digits as its factorization.

1021110222091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 1021110222091 its reverse (1902220111201), we get a palindrome (2923330333292).

The spelling of 1021110222091 in words is "one trillion, twenty-one billion, one hundred ten million, two hundred twenty-two thousand, ninety-one".