2020221121 has 2 divisors, whose sum is σ = 2020221122. Its totient is φ = 2020221120.

The previous prime is 2020221107. The next prime is 2020221139. The reversal of 2020221121 is 1211220202.

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., 1580857600 + 439363521 = 39760^2 + 20961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020221121 is a prime.

It is a super-3 number, since 3×2020221121³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2020228121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010110560 + 1010110561.

It is an arithmetic number, because the mean of its divisors is an integer number (1010110561).

Almost surely, 2^2020221121 is an apocalyptic number.

It is an amenable number.

2020221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020221121 is an equidigital number, since it uses as much as digits as its factorization.

2020221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2020221121 is about 44946.8699800108. The cubic root of 2020221121 is about 1264.1529886876.

Adding to 2020221121 its reverse (1211220202), we get a palindrome (3231441323).

The spelling of 2020221121 in words is "two billion, twenty million, two hundred twenty-one thousand, one hundred twenty-one".