121123210210 has 16 divisors (see below), whose sum is σ = 218045060856. Its totient is φ = 48444110208.

The previous prime is 121123210193. The next prime is 121123210231. The reversal of 121123210210 is 12012321121.

It can be written as a sum of positive squares in 4 ways, for example, as 101959514721 + 19163695489 = 319311^2 + 138433^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547689 + ... + 736348.

Almost surely, 2^121123210210 is an apocalyptic number.

121123210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121123210210 is a deficient number, since it is larger than the sum of its proper divisors (96921850646).

121123210210 is a wasteful number, since it uses less digits than its factorization.

121123210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293477.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121123210210 its reverse (12012321121), we get a palindrome (133135531331).

The spelling of 121123210210 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred ten thousand, two hundred ten".