1212401500987 has 2 divisors, whose sum is σ = 1212401500988. Its totient is φ = 1212401500986.

The previous prime is 1212401500969. The next prime is 1212401501027. The reversal of 1212401500987 is 7890051042121.

It is an a-pointer prime, because the next prime (1212401501027) can be obtained adding 1212401500987 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212401500987 - 2²⁷ = 1212267283259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212401500927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606200750493 + 606200750494.

It is an arithmetic number, because the mean of its divisors is an integer number (606200750494).

Almost surely, 2^{1212401500987} is an apocalyptic number.

1212401500987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212401500987 is an equidigital number, since it uses as much as digits as its factorization.

1212401500987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 1212401500987 in words is "one trillion, two hundred twelve billion, four hundred one million, five hundred thousand, nine hundred eighty-seven".