121330212210 has 48 divisors (see below), whose sum is σ = 318710724696. Its totient is φ = 32021167104.

The previous prime is 121330212169. The next prime is 121330212221. The reversal of 121330212210 is 12212033121.

121330212210 is a `hidden beast` number, since 1 + 213 + 30 + 212 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 111463167321 + 9867044889 = 333861^2 + 99333^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6940309 + ... + 6957768.

Almost surely, 2^121330212210 is an apocalyptic number.

121330212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121330212210 is an abundant number, since it is smaller than the sum of its proper divisors (197380512486).

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

121330212210 is a wasteful number, since it uses less digits than its factorization.

121330212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13898187 (or 13898184 counting only the distinct ones).

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

Adding to 121330212210 its reverse (12212033121), we get a palindrome (133542245331).

The spelling of 121330212210 in words is "one hundred twenty-one billion, three hundred thirty million, two hundred twelve thousand, two hundred ten".