121221114109 has 2 divisors, whose sum is σ = 121221114110. Its totient is φ = 121221114108.

The previous prime is 121221114101. The next prime is 121221114137. The reversal of 121221114109 is 901411122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64480444900 + 56740669209 = 253930^2 + 238203^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221114109 - 2³ = 121221114101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221114101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610557054 + 60610557055.

It is an arithmetic number, because the mean of its divisors is an integer number (60610557055).

Almost surely, 2^121221114109 is an apocalyptic number.

It is an amenable number.

121221114109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221114109 is an equidigital number, since it uses as much as digits as its factorization.

121221114109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 121221114109 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred fourteen thousand, one hundred nine".