121200214431 has 32 divisors (see below), whose sum is σ = 171313732800. Its totient is φ = 76082872320.

The previous prime is 121200214417. The next prime is 121200214439. The reversal of 121200214431 is 134412002121.

It is not a de Polignac number, because 121200214431 - 2¹¹ = 121200212383 is a prime.

It is a super-2 number, since 2×121200214431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121200214398 and 121200214407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200214439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13867695 + ... + 13876431.

It is an arithmetic number, because the mean of its divisors is an integer number (5353554150).

Almost surely, 2^121200214431 is an apocalyptic number.

121200214431 is a deficient number, since it is larger than the sum of its proper divisors (50113518369).

121200214431 is a wasteful number, since it uses less digits than its factorization.

121200214431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12699.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121200214431 its reverse (134412002121), we get a palindrome (255612216552).

The spelling of 121200214431 in words is "one hundred twenty-one billion, two hundred million, two hundred fourteen thousand, four hundred thirty-one".