121221101087 has 2 divisors, whose sum is σ = 121221101088. Its totient is φ = 121221101086.

The previous prime is 121221101083. The next prime is 121221101137. The reversal of 121221101087 is 780101122121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221101087 - 2² = 121221101083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221101083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610550543 + 60610550544.

It is an arithmetic number, because the mean of its divisors is an integer number (60610550544).

Almost surely, 2^121221101087 is an apocalyptic number.

121221101087 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221101087 is an equidigital number, since it uses as much as digits as its factorization.

121221101087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 121221101087 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, eighty-seven".