121102111987 has 2 divisors, whose sum is σ = 121102111988. Its totient is φ = 121102111986.

The previous prime is 121102111951. The next prime is 121102112023. The reversal of 121102111987 is 789111201121.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (121102111951) and next prime (121102112023).

It is an emirp because it is prime and its reverse (789111201121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121102111987 - 2³¹ = 118954628339 is a prime.

It is not a weakly prime, because it can be changed into another prime (121102111937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551055993 + 60551055994.

It is an arithmetic number, because the mean of its divisors is an integer number (60551055994).

Almost surely, 2^121102111987 is an apocalyptic number.

121102111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102111987 is an equidigital number, since it uses as much as digits as its factorization.

121102111987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 34.

The spelling of 121102111987 in words is "one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, nine hundred eighty-seven".