121121112221101 has 2 divisors, whose sum is σ = 121121112221102. Its totient is φ = 121121112221100.

The previous prime is 121121112221071. The next prime is 121121112221113. The reversal of 121121112221101 is 101122211121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115570541139876 + 5550571081225 = 10750374^2 + 2355965^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121112221101 - 2²⁵ = 121121078666669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121112221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560556110550 + 60560556110551.

It is an arithmetic number, because the mean of its divisors is an integer number (60560556110551).

Almost surely, 2^{121121112221101} is an apocalyptic number.

It is an amenable number.

121121112221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121112221101 is an equidigital number, since it uses as much as digits as its factorization.

121121112221101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121121112221101 its reverse (101122211121121), we get a palindrome (222243323342222).

The spelling of 121121112221101 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred one".