121321221300 has 108 divisors (see below), whose sum is σ = 381038112000. Its totient is φ = 32287371840.

The previous prime is 121321221277. The next prime is 121321221319. The reversal of 121321221300 is 3122123121.

121321221300 is a `hidden beast` number, since 1 + 21 + 321 + 2 + 21 + 300 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 314029 + ... + 584171.

Almost surely, 2^121321221300 is an apocalyptic number.

121321221300 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 121321221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190519056000).

121321221300 is an abundant number, since it is smaller than the sum of its proper divisors (259716890700).

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

121321221300 is a wasteful number, since it uses less digits than its factorization.

121321221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270662 (or 270652 counting only the distinct ones).

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

Adding to 121321221300 its reverse (3122123121), we get a palindrome (124443344421).

The spelling of 121321221300 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred twenty-one thousand, three hundred".