121213311213 has 16 divisors (see below), whose sum is σ = 163562120640. Its totient is φ = 79838115456.

The previous prime is 121213311157. The next prime is 121213311217. The reversal of 121213311213 is 312113312121.

It is not a de Polignac number, because 121213311213 - 2¹³ = 121213303021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121213311213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213311217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163206 + ... + 518712.

It is an arithmetic number, because the mean of its divisors is an integer number (10222632540).

Almost surely, 2^121213311213 is an apocalyptic number.

It is an amenable number.

121213311213 is a deficient number, since it is larger than the sum of its proper divisors (42348809427).

121213311213 is a wasteful number, since it uses less digits than its factorization.

121213311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356876.

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

Adding to 121213311213 its reverse (312113312121), we get a palindrome (433326623334).

The spelling of 121213311213 in words is "one hundred twenty-one billion, two hundred thirteen million, three hundred eleven thousand, two hundred thirteen".