20110001221002 has 128 divisors (see below), whose sum is σ = 52333271285760. Its totient is φ = 4995446639040.

The previous prime is 20110001220899. The next prime is 20110001221067. The reversal of 20110001221002 is 20012210001102.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65334499 + ... + 65641577.

It is an arithmetic number, because the mean of its divisors is an integer number (408853681920).

Almost surely, 2^{20110001221002} is an apocalyptic number.

20110001221002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110001221002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26166635642880).

20110001221002 is an abundant number, since it is smaller than the sum of its proper divisors (32223270064758).

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

20110001221002 is a wasteful number, since it uses less digits than its factorization.

20110001221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313288.

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

Adding to 20110001221002 its reverse (20012210001102), we get a palindrome (40122211222104).

The spelling of 20110001221002 in words is "twenty trillion, one hundred ten billion, one million, two hundred twenty-one thousand, two".