121222120002000 has 320 divisors, whose sum is σ = 391530036378624. Its totient is φ = 32267231539200.

The previous prime is 121222120001989. The next prime is 121222120002037. The reversal of 121222120002000 is 200021222121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8719127049 + ... + 8719140951.

Almost surely, 2^{121222120002000} is an apocalyptic number.

121222120002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121222120002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195765018189312).

121222120002000 is an abundant number, since it is smaller than the sum of its proper divisors (270307916376624).

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

121222120002000 is a wasteful number, since it uses less digits than its factorization.

121222120002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16463 (or 16447 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121222120002000 its reverse (200021222121), we get a palindrome (121422141224121).

The spelling of 121222120002000 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, two thousand".