121203321021000 has 1536 divisors, whose sum is σ = 448788060864000. Its totient is φ = 29398007808000.

The previous prime is 121203321020921. The next prime is 121203321021023. The reversal of 121203321021000 is 120123302121.

121203321021000 is a `hidden beast` number, since 1 + 2 + 120 + 332 + 1 + 0 + 210 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 213011108716 + ... + 213011109284.

It is an arithmetic number, because the mean of its divisors is an integer number (292179727125).

Almost surely, 2^{121203321021000} is an apocalyptic number.

121203321021000 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 121203321021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224394030432000).

121203321021000 is an abundant number, since it is smaller than the sum of its proper divisors (327584739843000).

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

121203321021000 is a wasteful number, since it uses less digits than its factorization.

121203321021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121203321021000 its reverse (120123302121), we get a palindrome (121323444323121).

The spelling of 121203321021000 in words is "one hundred twenty-one trillion, two hundred three billion, three hundred twenty-one million, twenty-one thousand".