101000221221091 has 2 divisors, whose sum is σ = 101000221221092. Its totient is φ = 101000221221090.

The previous prime is 101000221221079. The next prime is 101000221221101. The reversal of 101000221221091 is 190122122000101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101000221221091 - 2²¹ = 101000219123939 is a prime.

It is a super-2 number, since 2×101000221221091² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101000221225091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500110610545 + 50500110610546.

It is an arithmetic number, because the mean of its divisors is an integer number (50500110610546).

Almost surely, 2^{101000221221091} is an apocalyptic number.

101000221221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101000221221091 is an equidigital number, since it uses as much as digits as its factorization.

101000221221091 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 101000221221091 its reverse (190122122000101), we get a palindrome (291122343221192).

The spelling of 101000221221091 in words is "one hundred one trillion, two hundred twenty-one million, two hundred twenty-one thousand, ninety-one".