12221012211020 has 48 divisors (see below), whose sum is σ = 25897980013920. Its totient is φ = 4843883713536.

The previous prime is 12221012210999. The next prime is 12221012211041. The reversal of 12221012211020 is 2011221012221.

It is an interprime number because it is at equal distance from previous prime (12221012210999) and next prime (12221012211041).

It is a self number, because there is not a number n which added to its sum of digits gives 12221012211020.

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, 8006051 + ... + 9409509.

It is an arithmetic number, because the mean of its divisors is an integer number (539541250290).

Almost surely, 2^{12221012211020} is an apocalyptic number.

12221012211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221012211020 is an abundant number, since it is smaller than the sum of its proper divisors (13676967802900).

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

12221012211020 is a wasteful number, since it uses less digits than its factorization.

12221012211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407434 (or 1407432 counting only the distinct ones).

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

Adding to 12221012211020 its reverse (2011221012221), we get a palindrome (14232233223241).

The spelling of 12221012211020 in words is "twelve trillion, two hundred twenty-one billion, twelve million, two hundred eleven thousand, twenty".