1221131003087 has 2 divisors, whose sum is σ = 1221131003088. Its totient is φ = 1221131003086.

The previous prime is 1221131003077. The next prime is 1221131003117. The reversal of 1221131003087 is 7803001311221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221131003087 - 2⁶ = 1221131003023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221131003077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610565501543 + 610565501544.

It is an arithmetic number, because the mean of its divisors is an integer number (610565501544).

Almost surely, 2^{1221131003087} is an apocalyptic number.

1221131003087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221131003087 is an equidigital number, since it uses as much as digits as its factorization.

1221131003087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 1221131003087 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, three thousand, eighty-seven".