121221100969 has 2 divisors, whose sum is σ = 121221100970. Its totient is φ = 121221100968.

The previous prime is 121221100937. The next prime is 121221101003. The reversal of 121221100969 is 969001122121.

It is an a-pointer prime, because the next prime (121221101003) can be obtained adding 121221100969 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81296265625 + 39924835344 = 285125^2 + 199812^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221100969 - 2⁵ = 121221100937 is a prime.

It is a super-2 number, since 2×121221100969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221100909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610550484 + 60610550485.

It is an arithmetic number, because the mean of its divisors is an integer number (60610550485).

Almost surely, 2^121221100969 is an apocalyptic number.

It is an amenable number.

121221100969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221100969 is an equidigital number, since it uses as much as digits as its factorization.

121221100969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 121221100969 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, nine hundred sixty-nine".