121311213213 has 8 divisors (see below), whose sum is σ = 161760564000. Its totient is φ = 80868002288.

The previous prime is 121311213211. The next prime is 121311213229. The reversal of 121311213213 is 312312113121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121311213213 - 2¹ = 121311213211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121311213213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311213211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1488663 + ... + 1568036.

It is an arithmetic number, because the mean of its divisors is an integer number (20220070500).

Almost surely, 2^121311213213 is an apocalyptic number.

It is an amenable number.

121311213213 is a deficient number, since it is larger than the sum of its proper divisors (40449350787).

121311213213 is a wasteful number, since it uses less digits than its factorization.

121311213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069931.

The product of its digits is 216, while the sum is 21.

Adding to 121311213213 its reverse (312312113121), we get a palindrome (433623326334).

The spelling of 121311213213 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred thirteen thousand, two hundred thirteen".