12101021001989 has 2 divisors, whose sum is σ = 12101021001990. Its totient is φ = 12101021001988.

The previous prime is 12101021001943. The next prime is 12101021002001. The reversal of 12101021001989 is 98910012010121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11324348937889 + 776672064100 = 3365167^2 + 881290^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101021001989 - 2⁸ = 12101021001733 is a prime.

It is a super-2 number, since 2×12101021001989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101021007989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050510500994 + 6050510500995.

It is an arithmetic number, because the mean of its divisors is an integer number (6050510500995).

Almost surely, 2^{12101021001989} is an apocalyptic number.

It is an amenable number.

12101021001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101021001989 is an equidigital number, since it uses as much as digits as its factorization.

12101021001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 12101021001989 in words is "twelve trillion, one hundred one billion, twenty-one million, one thousand, nine hundred eighty-nine".