11212020002021 has 2 divisors, whose sum is σ = 11212020002022. Its totient is φ = 11212020002020.

The previous prime is 11212020002009. The next prime is 11212020002111. The reversal of 11212020002021 is 12020002021211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9502761849025 + 1709258152996 = 3082655^2 + 1307386^2 .

It is an emirp because it is prime and its reverse (12020002021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212020002021 - 2⁴² = 6813973490917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212020001987 and 11212020002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212020002221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606010001010 + 5606010001011.

It is an arithmetic number, because the mean of its divisors is an integer number (5606010001011).

Almost surely, 2^{11212020002021} is an apocalyptic number.

It is an amenable number.

11212020002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212020002021 is an equidigital number, since it uses as much as digits as its factorization.

11212020002021 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 14.

Adding to 11212020002021 its reverse (12020002021211), we get a palindrome (23232022023232).

The spelling of 11212020002021 in words is "eleven trillion, two hundred twelve billion, twenty million, two thousand, twenty-one".