221121100121023 has 2 divisors, whose sum is σ = 221121100121024. Its totient is φ = 221121100121022.

The previous prime is 221121100120979. The next prime is 221121100121063. The reversal of 221121100121023 is 320121001121122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221121100121023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221121100121063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560550060511 + 110560550060512.

It is an arithmetic number, because the mean of its divisors is an integer number (110560550060512).

Almost surely, 2^{221121100121023} is an apocalyptic number.

221121100121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121100121023 is an equidigital number, since it uses as much as digits as its factorization.

221121100121023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 221121100121023 its reverse (320121001121122), we get a palindrome (541242101242145).

The spelling of 221121100121023 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, twenty-three".