20211002020061 has 2 divisors, whose sum is σ = 20211002020062. Its totient is φ = 20211002020060.

The previous prime is 20211002020057. The next prime is 20211002020063. The reversal of 20211002020061 is 16002020011202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12475066384036 + 7735935636025 = 3532006^2 + 2781355^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211002020061 - 2² = 20211002020057 is a prime.

Together with 20211002020063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211002020063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105501010030 + 10105501010031.

It is an arithmetic number, because the mean of its divisors is an integer number (10105501010031).

Almost surely, 2^{20211002020061} is an apocalyptic number.

It is an amenable number.

20211002020061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211002020061 is an equidigital number, since it uses as much as digits as its factorization.

20211002020061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20211002020061 its reverse (16002020011202), we get a palindrome (36213022031263).

The spelling of 20211002020061 in words is "twenty trillion, two hundred eleven billion, two million, twenty thousand, sixty-one".