12021221221010 has 64 divisors (see below), whose sum is σ = 23110023859200. Its totient is φ = 4492213689600.

The previous prime is 12021221220997. The next prime is 12021221221021. The reversal of 12021221221010 is 1012212212021.

It is a super-2 number, since 2×12021221221010² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12021221221010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59403800 + ... + 59605820.

It is an arithmetic number, because the mean of its divisors is an integer number (361094122800).

Almost surely, 2^{12021221221010} is an apocalyptic number.

12021221221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021221221010 is a deficient number, since it is larger than the sum of its proper divisors (11088802638190).

12021221221010 is a wasteful number, since it uses less digits than its factorization.

12021221221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208707.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021221221010 its reverse (1012212212021), we get a palindrome (13033433433031).

The spelling of 12021221221010 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, ten".