121213141211 has 16 divisors (see below), whose sum is σ = 124472956608. Its totient is φ = 118002864000.

The previous prime is 121213141169. The next prime is 121213141249. The reversal of 121213141211 is 112141312121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121213141211 - 2¹⁰ = 121213140187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121213141811) 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, 2652125 + ... + 2697441.

It is an arithmetic number, because the mean of its divisors is an integer number (7779559788).

Almost surely, 2^121213141211 is an apocalyptic number.

121213141211 is a deficient number, since it is larger than the sum of its proper divisors (3259815397).

121213141211 is a wasteful number, since it uses less digits than its factorization.

121213141211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45862.

The product of its digits is 96, while the sum is 20.

Adding to 121213141211 its reverse (112141312121), we get a palindrome (233354453332).

The spelling of 121213141211 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred forty-one thousand, two hundred eleven".