1212211100987 has 2 divisors, whose sum is σ = 1212211100988. Its totient is φ = 1212211100986.

The previous prime is 1212211100981. The next prime is 1212211101041. The reversal of 1212211100987 is 7890011122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212211100987 - 2¹⁸ = 1212210838843 is a prime.

It is a super-2 number, since 2×1212211100987² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212211100981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105550493 + 606105550494.

It is an arithmetic number, because the mean of its divisors is an integer number (606105550494).

Almost surely, 2^{1212211100987} is an apocalyptic number.

1212211100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211100987 is an equidigital number, since it uses as much as digits as its factorization.

1212211100987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 1212211100987 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, nine hundred eighty-seven".