121122100021987 has 2 divisors, whose sum is σ = 121122100021988. Its totient is φ = 121122100021986.

The previous prime is 121122100021913. The next prime is 121122100022023. The reversal of 121122100021987 is 789120001221121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121122100021987 is a prime.

It is a super-2 number, since 2×121122100021987² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121122100021387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561050010993 + 60561050010994.

It is an arithmetic number, because the mean of its divisors is an integer number (60561050010994).

Almost surely, 2^{121122100021987} is an apocalyptic number.

121122100021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122100021987 is an equidigital number, since it uses as much as digits as its factorization.

121122100021987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 121122100021987 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred million, twenty-one thousand, nine hundred eighty-seven".