1212210111213 has 6 divisors (see below), whose sum is σ = 1750970160654. Its totient is φ = 808140074136.

The previous prime is 1212210111139. The next prime is 1212210111269. The reversal of 1212210111213 is 3121110122121.

It is a happy number.

1212210111213 is a `hidden beast` number, since 121 + 221 + 0 + 111 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1171239088644 + 40971022569 = 1082238^2 + 202413^2 .

It is not a de Polignac number, because 1212210111213 - 2¹⁶ = 1212210045677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210111313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67345006170 + ... + 67345006187.

It is an arithmetic number, because the mean of its divisors is an integer number (291828360109).

Almost surely, 2^{1212210111213} is an apocalyptic number.

It is an amenable number.

1212210111213 is a deficient number, since it is larger than the sum of its proper divisors (538760049441).

1212210111213 is a wasteful number, since it uses less digits than its factorization.

1212210111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134690012363 (or 134690012360 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1212210111213 its reverse (3121110122121), we get a palindrome (4333320233334).

The spelling of 1212210111213 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred eleven thousand, two hundred thirteen".