121120101122221 has 2 divisors, whose sum is σ = 121120101122222. Its totient is φ = 121120101122220.

The previous prime is 121120101122177. The next prime is 121120101122263. The reversal of 121120101122221 is 122221101021121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95973587085321 + 25146514036900 = 9796611^2 + 5014630^2 .

It is a cyclic number.

It is not a de Polignac number, because 121120101122221 - 2²³ = 121120092733613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121120101122521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560050561110 + 60560050561111.

It is an arithmetic number, because the mean of its divisors is an integer number (60560050561111).

Almost surely, 2^{121120101122221} is an apocalyptic number.

It is an amenable number.

121120101122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120101122221 is an equidigital number, since it uses as much as digits as its factorization.

121120101122221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121120101122221 its reverse (122221101021121), we get a palindrome (243341202143342).

The spelling of 121120101122221 in words is "one hundred twenty-one trillion, one hundred twenty billion, one hundred one million, one hundred twenty-two thousand, two hundred twenty-one".