121221122000 has 80 divisors (see below), whose sum is σ = 319759337664. Its totient is φ = 44080400000.

The previous prime is 121221121997. The next prime is 121221122021. The reversal of 121221122000 is 221122121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2733026 + ... + 2777025.

Almost surely, 2^121221122000 is an apocalyptic number.

121221122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221122000 is an abundant number, since it is smaller than the sum of its proper divisors (198538215664).

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

121221122000 is a wasteful number, since it uses less digits than its factorization.

121221122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510085 (or 5510069 counting only the distinct ones).

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

Adding to 121221122000 its reverse (221122121), we get a palindrome (121442244121).

The spelling of 121221122000 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand".