1221243932087 has 2 divisors, whose sum is σ = 1221243932088. Its totient is φ = 1221243932086.

The previous prime is 1221243931927. The next prime is 1221243932089. The reversal of 1221243932087 is 7802393421221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221243932087 - 2¹² = 1221243927991 is a prime.

Together with 1221243932089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221243932089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610621966043 + 610621966044.

It is an arithmetic number, because the mean of its divisors is an integer number (610621966044).

Almost surely, 2^{1221243932087} is an apocalyptic number.

1221243932087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221243932087 is an equidigital number, since it uses as much as digits as its factorization.

1221243932087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 1221243932087 in words is "one trillion, two hundred twenty-one billion, two hundred forty-three million, nine hundred thirty-two thousand, eighty-seven".