121000210 has 32 divisors (see below), whose sum is σ = 222454512. Its totient is φ = 47374080.

The previous prime is 121000199. The next prime is 121000211. The reversal of 121000210 is 12000121.

It can be written as a sum of positive squares in 8 ways, for example, as 90231001 + 30769209 = 9499^2 + 5547^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121000193 and 121000202.

It is not an unprimeable number, because it can be changed into a prime (121000211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178392 + ... + 179068.

Almost surely, 2^121000210 is an apocalyptic number.

121000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000210 is a deficient number, since it is larger than the sum of its proper divisors (101454302).

121000210 is a wasteful number, since it uses less digits than its factorization.

121000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 121000210 is about 11000.0095454504. The cubic root of 121000210 is about 494.6090304620.

Adding to 121000210 its reverse (12000121), we get a palindrome (133000331).

The spelling of 121000210 in words is "one hundred twenty-one million, two hundred ten", and thus it is an aban number.