20103311221421 has 16 divisors (see below), whose sum is σ = 21016070538624. Its totient is φ = 19193781809664.

The previous prime is 20103311221361. The next prime is 20103311221429. The reversal of 20103311221421 is 12412211330102.

It is a cyclic number.

It is not a de Polignac number, because 20103311221421 - 2¹⁰ = 20103311220397 is a prime.

It is a super-2 number, since 2×20103311221421² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103311221429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225488165 + ... + 225577301.

It is an arithmetic number, because the mean of its divisors is an integer number (1313504408664).

Almost surely, 2^{20103311221421} is an apocalyptic number.

It is an amenable number.

20103311221421 is a deficient number, since it is larger than the sum of its proper divisors (912759317203).

20103311221421 is a wasteful number, since it uses less digits than its factorization.

20103311221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107140.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20103311221421 its reverse (12412211330102), we get a palindrome (32515522551523).

The spelling of 20103311221421 in words is "twenty trillion, one hundred three billion, three hundred eleven million, two hundred twenty-one thousand, four hundred twenty-one".