12121010010 has 48 divisors (see below), whose sum is σ = 32185161216. Its totient is φ = 3163496544.

The previous prime is 12121010003. The next prime is 12121010039. The reversal of 12121010010 is 1001012121.

It is a happy number.

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 = 12121009974 and 12121010001.

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, 1428514 + ... + 1436973.

It is an arithmetic number, because the mean of its divisors is an integer number (670524192).

Almost surely, 2^12121010010 is an apocalyptic number.

12121010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121010010 is an abundant number, since it is smaller than the sum of its proper divisors (20064151206).

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

12121010010 is a wasteful number, since it uses less digits than its factorization.

12121010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865547 (or 2865544 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12121010010 its reverse (1001012121), we get a palindrome (13122022131).

The spelling of 12121010010 in words is "twelve billion, one hundred twenty-one million, ten thousand, ten".