1221020140259 has 2 divisors, whose sum is σ = 1221020140260. Its totient is φ = 1221020140258.

The previous prime is 1221020140253. The next prime is 1221020140337. The reversal of 1221020140259 is 9520410201221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221020140259 - 2²⁰ = 1221019091683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221020140253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610510070129 + 610510070130.

It is an arithmetic number, because the mean of its divisors is an integer number (610510070130).

Almost surely, 2^{1221020140259} is an apocalyptic number.

1221020140259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221020140259 is an equidigital number, since it uses as much as digits as its factorization.

1221020140259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 1221020140259 in words is "one trillion, two hundred twenty-one billion, twenty million, one hundred forty thousand, two hundred fifty-nine".