121213201133 has 4 divisors (see below), whose sum is σ = 122026712700. Its totient is φ = 120399689568.

The previous prime is 121213201103. The next prime is 121213201141. The reversal of 121213201133 is 331102312121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331102312121 = 7 ⋅47300330303.

It can be written as a sum of positive squares in 2 ways, for example, as 73426366729 + 47786834404 = 270973^2 + 218602^2 .

It is a cyclic number.

It is not a de Polignac number, because 121213201133 - 2¹⁴ = 121213184749 is a prime.

It is a super-2 number, since 2×121213201133² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213201103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406755560 + ... + 406755857.

It is an arithmetic number, because the mean of its divisors is an integer number (30506678175).

Almost surely, 2^121213201133 is an apocalyptic number.

It is an amenable number.

121213201133 is a deficient number, since it is larger than the sum of its proper divisors (813511567).

121213201133 is an equidigital number, since it uses as much as digits as its factorization.

121213201133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813511566.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121213201133 its reverse (331102312121), we get a palindrome (452315513254).

The spelling of 121213201133 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred one thousand, one hundred thirty-three".