121221303000 has 128 divisors (see below), whose sum is σ = 432240606720. Its totient is φ = 27707721600.

The previous prime is 121221302981. The next prime is 121221303013. The reversal of 121221303000 is 303122121.

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 31 ways as a sum of consecutive naturals, for example, 2865222 + ... + 2907221.

It is an arithmetic number, because the mean of its divisors is an integer number (3376879740).

Almost surely, 2^121221303000 is an apocalyptic number.

121221303000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221303000 is an abundant number, since it is smaller than the sum of its proper divisors (311019303720).

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

121221303000 is a wasteful number, since it uses less digits than its factorization.

121221303000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772474 (or 5772460 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121221303000 its reverse (303122121), we get a palindrome (121524425121).

The spelling of 121221303000 in words is "one hundred twenty-one billion, two hundred twenty-one million, three hundred three thousand".