101221011121091 has 2 divisors, whose sum is σ = 101221011121092. Its totient is φ = 101221011121090.

The previous prime is 101221011121001. The next prime is 101221011121121. The reversal of 101221011121091 is 190121110122101.

It is a strong prime.

It is an emirp because it is prime and its reverse (190121110122101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221011121091 is a prime.

It is not a weakly prime, because it can be changed into another prime (101221011121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610505560545 + 50610505560546.

It is an arithmetic number, because the mean of its divisors is an integer number (50610505560546).

Almost surely, 2^{101221011121091} is an apocalyptic number.

101221011121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221011121091 is an equidigital number, since it uses as much as digits as its factorization.

101221011121091 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 23.

Adding to 101221011121091 its reverse (190121110122101), we get a palindrome (291342121243192).

The spelling of 101221011121091 in words is "one hundred one trillion, two hundred twenty-one billion, eleven million, one hundred twenty-one thousand, ninety-one".