121000213020 has 24 divisors (see below), whose sum is σ = 338800596624. Its totient is φ = 32266723456.

The previous prime is 121000213001. The next prime is 121000213109. The reversal of 121000213020 is 20312000121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121000212987 and 121000213005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008335049 + ... + 1008335168.

It is an arithmetic number, because the mean of its divisors is an integer number (14116691526).

Almost surely, 2^121000213020 is an apocalyptic number.

121000213020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000213020 is an abundant number, since it is smaller than the sum of its proper divisors (217800383604).

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

121000213020 is a wasteful number, since it uses less digits than its factorization.

121000213020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016670229 (or 2016670227 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121000213020 its reverse (20312000121), we get a palindrome (141312213141).

The spelling of 121000213020 in words is "one hundred twenty-one billion, two hundred thirteen thousand, twenty".