121200211213 has 8 divisors (see below), whose sum is σ = 128438318520. Its totient is φ = 113974179840.

The previous prime is 121200211211. The next prime is 121200211219. The reversal of 121200211213 is 312112002121.

It can be written as a sum of positive squares in 4 ways, for example, as 41452145604 + 79748065609 = 203598^2 + 282397^2 .

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

It is not a de Polignac number, because 121200211213 - 2¹ = 121200211211 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 (121200211211) 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, 2998308 + ... + 3038461.

It is an arithmetic number, because the mean of its divisors is an integer number (16054789815).

Almost surely, 2^121200211213 is an apocalyptic number.

It is an amenable number.

121200211213 is a deficient number, since it is larger than the sum of its proper divisors (7238107307).

121200211213 is a wasteful number, since it uses less digits than its factorization.

121200211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037967.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121200211213 its reverse (312112002121), we get a palindrome (433312213334).

The spelling of 121200211213 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, two hundred thirteen".