12021221010 has 32 divisors (see below), whose sum is σ = 28858707072. Its totient is φ = 3204794880.

The previous prime is 12021220993. The next prime is 12021221021. The reversal of 12021221010 is 1012212021.

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, 63330 + ... + 167490.

It is an arithmetic number, because the mean of its divisors is an integer number (901834596).

Almost surely, 2^12021221010 is an apocalyptic number.

12021221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021221010 is an abundant number, since it is smaller than the sum of its proper divisors (16837486062).

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

12021221010 is a wasteful number, since it uses less digits than its factorization.

12021221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108018.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12021221010 its reverse (1012212021), we get a palindrome (13033433031).

The spelling of 12021221010 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, ten".