1212020111213 has 4 divisors (see below), whose sum is σ = 1223347402080. Its totient is φ = 1200692820348.

The previous prime is 1212020111209. The next prime is 1212020111219. The reversal of 1212020111213 is 3121110202121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212020111213 - 2² = 1212020111209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212020111191 and 1212020111200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020111219) 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, 5663645273 + ... + 5663645486.

It is an arithmetic number, because the mean of its divisors is an integer number (305836850520).

Almost surely, 2^{1212020111213} is an apocalyptic number.

It is an amenable number.

1212020111213 is a deficient number, since it is larger than the sum of its proper divisors (11327290867).

1212020111213 is a wasteful number, since it uses less digits than its factorization.

1212020111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11327290866.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1212020111213 its reverse (3121110202121), we get a palindrome (4333130313334).

The spelling of 1212020111213 in words is "one trillion, two hundred twelve billion, twenty million, one hundred eleven thousand, two hundred thirteen".