1200221229989 has 2 divisors, whose sum is σ = 1200221229990. Its totient is φ = 1200221229988.

The previous prime is 1200221229979. The next prime is 1200221230073. The reversal of 1200221229989 is 9899221220021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184233650625 + 15987579364 = 1088225^2 + 126442^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200221229989 - 2³² = 1195926262693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200221229919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600110614994 + 600110614995.

It is an arithmetic number, because the mean of its divisors is an integer number (600110614995).

Almost surely, 2^{1200221229989} is an apocalyptic number.

It is an amenable number.

1200221229989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200221229989 is an equidigital number, since it uses as much as digits as its factorization.

1200221229989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 1200221229989 in words is "one trillion, two hundred billion, two hundred twenty-one million, two hundred twenty-nine thousand, nine hundred eighty-nine".