12212121010 has 32 divisors (see below), whose sum is σ = 22554806400. Its totient is φ = 4757907840.

The previous prime is 12212121001. The next prime is 12212121011. The reversal of 12212121010 is 1012121221.

It is not an unprimeable number, because it can be changed into a prime (12212121011) 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, 229731 + ... + 277849.

It is an arithmetic number, because the mean of its divisors is an integer number (704837700).

Almost surely, 2^12212121010 is an apocalyptic number.

12212121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12212121010 is a deficient number, since it is larger than the sum of its proper divisors (10342685390).

12212121010 is a wasteful number, since it uses less digits than its factorization.

12212121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48786.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12212121010 its reverse (1012121221), we get a palindrome (13224242231).

The spelling of 12212121010 in words is "twelve billion, two hundred twelve million, one hundred twenty-one thousand, ten".