121220201200000 has 192 divisors, whose sum is σ = 344968456543200. Its totient is φ = 41561210880000.

The previous prime is 121220201199989. The next prime is 121220201200001. The reversal of 121220201200000 is 2102022121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220201200001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18846465 + ... + 24446464.

Almost surely, 2^{121220201200000} is an apocalyptic number.

121220201200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220201200000 is an abundant number, since it is smaller than the sum of its proper divisors (223748255343200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220201200000 is an frugal number, since it uses more digits than its factorization.

121220201200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43292975 (or 43292943 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121220201200000 its reverse (2102022121), we get a palindrome (121222303222121).

The spelling of 121220201200000 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred one million, two hundred thousand".