121200212021 has 32 divisors (see below), whose sum is σ = 142730726400. Its totient is φ = 100780692480.

The previous prime is 121200212017. The next prime is 121200212041. The reversal of 121200212021 is 120212002121.

It is a cyclic number.

It is not a de Polignac number, because 121200212021 - 2² = 121200212017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121200211987 and 121200212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200212041) 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, 10853681 + ... + 10864841.

It is an arithmetic number, because the mean of its divisors is an integer number (4460335200).

Almost surely, 2^121200212021 is an apocalyptic number.

It is an amenable number.

121200212021 is a deficient number, since it is larger than the sum of its proper divisors (21530514379).

121200212021 is a wasteful number, since it uses less digits than its factorization.

121200212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121200212021 its reverse (120212002121), we get a palindrome (241412214142).

The spelling of 121200212021 in words is "one hundred twenty-one billion, two hundred million, two hundred twelve thousand, twenty-one".