20201210021189 has 2 divisors, whose sum is σ = 20201210021190. Its totient is φ = 20201210021188.

The previous prime is 20201210021183. The next prime is 20201210021221. The reversal of 20201210021189 is 98112001210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20153069273089 + 48140748100 = 4489217^2 + 219410^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201210021189 - 2⁴ = 20201210021173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201210021183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100605010594 + 10100605010595.

It is an arithmetic number, because the mean of its divisors is an integer number (10100605010595).

Almost surely, 2^{20201210021189} is an apocalyptic number.

It is an amenable number.

20201210021189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201210021189 is an equidigital number, since it uses as much as digits as its factorization.

20201210021189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 20201210021189 in words is "twenty trillion, two hundred one billion, two hundred ten million, twenty-one thousand, one hundred eighty-nine".