2020220201981 has 2 divisors, whose sum is σ = 2020220201982. Its totient is φ = 2020220201980.

The previous prime is 2020220201933. The next prime is 2020220202061. The reversal of 2020220201981 is 1891020220202.

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., 1057596276025 + 962623925956 = 1028395^2 + 981134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020220201981 - 2³⁰ = 2019146460157 is a prime.

It is a super-2 number, since 2×2020220201981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020220201911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010110100990 + 1010110100991.

It is an arithmetic number, because the mean of its divisors is an integer number (1010110100991).

Almost surely, 2^{2020220201981} is an apocalyptic number.

It is an amenable number.

2020220201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020220201981 is an equidigital number, since it uses as much as digits as its factorization.

2020220201981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 2020220201981 in words is "two trillion, twenty billion, two hundred twenty million, two hundred one thousand, nine hundred eighty-one".