12121010 has 32 divisors (see below), whose sum is σ = 24058944. Its totient is φ = 4360000.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121010 is 1012121.

12121010 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10565 + ... + 11655.

It is an arithmetic number, because the mean of its divisors is an integer number (751842).

Almost surely, 2^12121010 is an apocalyptic number.

12121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121010 is a deficient number, since it is larger than the sum of its proper divisors (11937934).

12121010 is a wasteful number, since it uses less digits than its factorization.

12121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 12121010 is about 3481.5240915438. The cubic root of 12121010 is about 229.7098420428.

Adding to 12121010 its reverse (1012121), we get a palindrome (13133131).

Subtracting from 12121010 its reverse (1012121), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 1212 and 1010, that added together give a palindrome (2222).

The spelling of 12121010 in words is "twelve million, one hundred twenty-one thousand, ten".