121000020210 has 96 divisors (see below), whose sum is σ = 337502168640. Its totient is φ = 31154010048.

The previous prime is 121000020203. The next prime is 121000020283. The reversal of 121000020210 is 12020000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121000020192 and 121000020201.

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 47 ways as a sum of consecutive naturals, for example, 788052 + ... + 928991.

It is an arithmetic number, because the mean of its divisors is an integer number (3515647590).

Almost surely, 2^121000020210 is an apocalyptic number.

121000020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000020210 is an abundant number, since it is smaller than the sum of its proper divisors (216502148430).

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

121000020210 is a wasteful number, since it uses less digits than its factorization.

121000020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717094 (or 1717082 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000020210 its reverse (12020000121), we get a palindrome (133020020331).

The spelling of 121000020210 in words is "one hundred twenty-one billion, twenty thousand, two hundred ten".