10121221212 has 24 divisors (see below), whose sum is σ = 24430534800. Its totient is φ = 3257404416.

The previous prime is 10121221171. The next prime is 10121221223. The reversal of 10121221212 is 21212212101.

It is a junction number, because it is equal to n+sod(n) for n = 10121221191 and 10121221200.

It is a congruent number.

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, 14541637 + ... + 14542332.

It is an arithmetic number, because the mean of its divisors is an integer number (1017938950).

Almost surely, 2^10121221212 is an apocalyptic number.

10121221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10121221212 is an abundant number, since it is smaller than the sum of its proper divisors (14309313588).

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

10121221212 is a wasteful number, since it uses less digits than its factorization.

10121221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29084005 (or 29084003 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10121221212 its reverse (21212212101), we get a palindrome (31333433313).

The spelling of 10121221212 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".