202111213 has 2 divisors, whose sum is σ = 202111214. Its totient is φ = 202111212.

The previous prime is 202111183. The next prime is 202111243. The reversal of 202111213 is 312111202.

It is a balanced prime because it is at equal distance from previous prime (202111183) and next prime (202111243).

It can be written as a sum of positive squares in only one way, i.e., 105226564 + 96884649 = 10258^2 + 9843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202111213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202111193 and 202111202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202111243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055606 + 101055607.

It is an arithmetic number, because the mean of its divisors is an integer number (101055607).

Almost surely, 2^202111213 is an apocalyptic number.

It is an amenable number.

202111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111213 is an equidigital number, since it uses as much as digits as its factorization.

202111213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 202111213 is about 14216.5823248768. The cubic root of 202111213 is about 586.8540906778.

Adding to 202111213 its reverse (312111202), we get a palindrome (514222415).

The spelling of 202111213 in words is "two hundred two million, one hundred eleven thousand, two hundred thirteen".