2021970889801 has 2 divisors, whose sum is σ = 2021970889802. Its totient is φ = 2021970889800.

The previous prime is 2021970889781. The next prime is 2021970889843. The reversal of 2021970889801 is 1089880791202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1720596241225 + 301374648576 = 1311715^2 + 548976^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021970889801 - 2²³ = 2021962501193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021970889201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010985444900 + 1010985444901.

It is an arithmetic number, because the mean of its divisors is an integer number (1010985444901).

Almost surely, 2^{2021970889801} is an apocalyptic number.

It is an amenable number.

2021970889801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021970889801 is an equidigital number, since it uses as much as digits as its factorization.

2021970889801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The spelling of 2021970889801 in words is "two trillion, twenty-one billion, nine hundred seventy million, eight hundred eighty-nine thousand, eight hundred one".