1220122009987 has 2 divisors, whose sum is σ = 1220122009988. Its totient is φ = 1220122009986.

The previous prime is 1220122009969. The next prime is 1220122010039. The reversal of 1220122009987 is 7899002210221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220122009987 - 2¹⁹ = 1220121485699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220122009937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610061004993 + 610061004994.

It is an arithmetic number, because the mean of its divisors is an integer number (610061004994).

Almost surely, 2^{1220122009987} is an apocalyptic number.

1220122009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220122009987 is an equidigital number, since it uses as much as digits as its factorization.

1220122009987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 1220122009987 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, nine thousand, nine hundred eighty-seven".