1212323310101 has 4 divisors (see below), whose sum is σ = 1212356227104. Its totient is φ = 1212290393100.

The previous prime is 1212323310083. The next prime is 1212323310137. The reversal of 1212323310101 is 1010133232121.

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 1212323310101 - 2³⁴ = 1195143440917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212323310161) 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, 16403195 + ... + 16476936.

It is an arithmetic number, because the mean of its divisors is an integer number (303089056776).

Almost surely, 2^{1212323310101} is an apocalyptic number.

It is an amenable number.

1212323310101 is a deficient number, since it is larger than the sum of its proper divisors (32917003).

1212323310101 is an equidigital number, since it uses as much as digits as its factorization.

1212323310101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32917002.

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

Adding to 1212323310101 its reverse (1010133232121), we get a palindrome (2222456542222).

The spelling of 1212323310101 in words is "one trillion, two hundred twelve billion, three hundred twenty-three million, three hundred ten thousand, one hundred one".