213033220121 has 2 divisors, whose sum is σ = 213033220122. Its totient is φ = 213033220120.

The previous prime is 213033220073. The next prime is 213033220303. The reversal of 213033220121 is 121022330312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206642976400 + 6390243721 = 454580^2 + 79939^2 .

It is a cyclic number.

It is not a de Polignac number, because 213033220121 - 2²⁶ = 212966111257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213033220093 and 213033220102.

It is not a weakly prime, because it can be changed into another prime (213033220921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106516610060 + 106516610061.

It is an arithmetic number, because the mean of its divisors is an integer number (106516610061).

Almost surely, 2^213033220121 is an apocalyptic number.

It is an amenable number.

213033220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213033220121 is an equidigital number, since it uses as much as digits as its factorization.

213033220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213033220121 its reverse (121022330312), we get a palindrome (334055550433).

The spelling of 213033220121 in words is "two hundred thirteen billion, thirty-three million, two hundred twenty thousand, one hundred twenty-one".