212020121101 has 2 divisors, whose sum is σ = 212020121102. Its totient is φ = 212020121100.

The previous prime is 212020121099. The next prime is 212020121149. The reversal of 212020121101 is 101121020212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107435795076 + 104584326025 = 327774^2 + 323395^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020121101 - 2¹ = 212020121099 is a prime.

Together with 212020121099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212020121701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010060550 + 106010060551.

It is an arithmetic number, because the mean of its divisors is an integer number (106010060551).

Almost surely, 2^212020121101 is an apocalyptic number.

It is an amenable number.

212020121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020121101 is an equidigital number, since it uses as much as digits as its factorization.

212020121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212020121101 its reverse (101121020212), we get a palindrome (313141141313).

The spelling of 212020121101 in words is "two hundred twelve billion, twenty million, one hundred twenty-one thousand, one hundred one".