1220101109989 has 2 divisors, whose sum is σ = 1220101109990. Its totient is φ = 1220101109988.

The previous prime is 1220101109987. The next prime is 1220101110047. The reversal of 1220101109989 is 9899011010221.

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., 966505272100 + 253595837889 = 983110^2 + 503583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220101109989 - 2¹ = 1220101109987 is a prime.

Together with 1220101109987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220101109987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610050554994 + 610050554995.

It is an arithmetic number, because the mean of its divisors is an integer number (610050554995).

Almost surely, 2^{1220101109989} is an apocalyptic number.

It is an amenable number.

1220101109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220101109989 is an equidigital number, since it uses as much as digits as its factorization.

1220101109989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 1220101109989 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred nine thousand, nine hundred eighty-nine".