121223101213 has 4 divisors (see below), whose sum is σ = 122585158620. Its totient is φ = 119861043808.

The previous prime is 121223101201. The next prime is 121223101249. The reversal of 121223101213 is 312101322121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9745243524 + 111477857689 = 98718^2 + 333883^2 .

It is a cyclic number.

It is not a de Polignac number, because 121223101213 - 2³³ = 112633166621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223101613) 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, 681028570 + ... + 681028747.

It is an arithmetic number, because the mean of its divisors is an integer number (30646289655).

Almost surely, 2^121223101213 is an apocalyptic number.

It is an amenable number.

121223101213 is a deficient number, since it is larger than the sum of its proper divisors (1362057407).

121223101213 is an equidigital number, since it uses as much as digits as its factorization.

121223101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362057406.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121223101213 its reverse (312101322121), we get a palindrome (433324423334).

The spelling of 121223101213 in words is "one hundred twenty-one billion, two hundred twenty-three million, one hundred one thousand, two hundred thirteen".