202121001221213 has 2 divisors, whose sum is σ = 202121001221214. Its totient is φ = 202121001221212.

The previous prime is 202121001221201. The next prime is 202121001221267. The reversal of 202121001221213 is 312122100121202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186698391992644 + 15422609228569 = 13663762^2 + 3927163^2 .

It is a cyclic number.

It is not a de Polignac number, because 202121001221213 - 2¹² = 202121001217117 is a prime.

It is a super-2 number, since 2×202121001221213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202121001241213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060500610606 + 101060500610607.

It is an arithmetic number, because the mean of its divisors is an integer number (101060500610607).

Almost surely, 2^{202121001221213} is an apocalyptic number.

It is an amenable number.

202121001221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121001221213 is an equidigital number, since it uses as much as digits as its factorization.

202121001221213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 202121001221213 its reverse (312122100121202), we get a palindrome (514243101342415).

The spelling of 202121001221213 in words is "two hundred two trillion, one hundred twenty-one billion, one million, two hundred twenty-one thousand, two hundred thirteen".