3621212211121 has 2 divisors, whose sum is σ = 3621212211122. Its totient is φ = 3621212211120.

The previous prime is 3621212211103. The next prime is 3621212211157. The reversal of 3621212211121 is 1211122121263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2909450015521 + 711762195600 = 1705711^2 + 843660^2 .

It is an emirp because it is prime and its reverse (1211122121263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3621212211121 - 2²³ = 3621203822513 is a prime.

It is a super-2 number, since 2×3621212211121² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3621212211101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810606105560 + 1810606105561.

It is an arithmetic number, because the mean of its divisors is an integer number (1810606105561).

Almost surely, 2^{3621212211121} is an apocalyptic number.

It is an amenable number.

3621212211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621212211121 is an equidigital number, since it uses as much as digits as its factorization.

3621212211121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

Adding to 3621212211121 its reverse (1211122121263), we get a palindrome (4832334332384).

The spelling of 3621212211121 in words is "three trillion, six hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-one".