12011021001989 has 2 divisors, whose sum is σ = 12011021001990. Its totient is φ = 12011021001988.

The previous prime is 12011021001901. The next prime is 12011021002091. The reversal of 12011021001989 is 98910012011021.

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., 10785693768964 + 1225327233025 = 3284158^2 + 1106945^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011021001989 - 2²⁴ = 12011004224773 is a prime.

It is a super-2 number, since 2×12011021001989² (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 (12011021001389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005510500994 + 6005510500995.

It is an arithmetic number, because the mean of its divisors is an integer number (6005510500995).

Almost surely, 2^{12011021001989} is an apocalyptic number.

It is an amenable number.

12011021001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011021001989 is an equidigital number, since it uses as much as digits as its factorization.

12011021001989 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 12011021001989 in words is "twelve trillion, eleven billion, twenty-one million, one thousand, nine hundred eighty-nine".