2021121061 has 2 divisors, whose sum is σ = 2021121062. Its totient is φ = 2021121060.

The previous prime is 2021121017. The next prime is 2021121077. The reversal of 2021121061 is 1601211202.

It is an a-pointer prime, because the next prime (2021121077) can be obtained adding 2021121061 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1733140161 + 287980900 = 41631^2 + 16970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021121061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021125061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560530 + 1010560531.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560531).

Almost surely, 2^2021121061 is an apocalyptic number.

It is an amenable number.

2021121061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021121061 is an equidigital number, since it uses as much as digits as its factorization.

2021121061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2021121061 is about 44956.8800185244. The cubic root of 2021121061 is about 1264.3406732502.

Adding to 2021121061 its reverse (1601211202), we get a palindrome (3622332263).

The spelling of 2021121061 in words is "two billion, twenty-one million, one hundred twenty-one thousand, sixty-one".