220121012012087 has 2 divisors, whose sum is σ = 220121012012088. Its totient is φ = 220121012012086.

The previous prime is 220121012012039. The next prime is 220121012012137. The reversal of 220121012012087 is 780210210121022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220121012012087 - 2¹⁸ = 220121011749943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121012032087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060506006043 + 110060506006044.

It is an arithmetic number, because the mean of its divisors is an integer number (110060506006044).

Almost surely, 2^{220121012012087} is an apocalyptic number.

220121012012087 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121012012087 is an equidigital number, since it uses as much as digits as its factorization.

220121012012087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

The spelling of 220121012012087 in words is "two hundred twenty trillion, one hundred twenty-one billion, twelve million, twelve thousand, eighty-seven".