20011221201102 has 32 divisors (see below), whose sum is σ = 41114374608672. Its totient is φ = 6488508230784.

The previous prime is 20011221201067. The next prime is 20011221201149. The reversal of 20011221201102 is 20110212211002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10340193 + ... + 12121964.

It is an arithmetic number, because the mean of its divisors is an integer number (1284824206521).

Almost surely, 2^{20011221201102} is an apocalyptic number.

20011221201102 is an abundant number, since it is smaller than the sum of its proper divisors (21103153407570).

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

20011221201102 is a wasteful number, since it uses less digits than its factorization.

20011221201102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22466212.

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

Adding to 20011221201102 its reverse (20110212211002), we get a palindrome (40121433412104).

The spelling of 20011221201102 in words is "twenty trillion, eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred two".