2013203455221 has 16 divisors (see below), whose sum is σ = 3069171520128. Its totient is φ = 1149864628800.

The previous prime is 2013203455187. The next prime is 2013203455349. The reversal of 2013203455221 is 1225543023102.

It is not a de Polignac number, because 2013203455221 - 2⁷ = 2013203455093 is a prime.

It is a super-2 number, since 2×2013203455221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013203451221) 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, 22343370 + ... + 22433291.

It is an arithmetic number, because the mean of its divisors is an integer number (191823220008).

Almost surely, 2^{2013203455221} is an apocalyptic number.

2013203455221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2013203455221 is a deficient number, since it is larger than the sum of its proper divisors (1055968064907).

2013203455221 is a wasteful number, since it uses less digits than its factorization.

2013203455221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44778812.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 2013203455221 its reverse (1225543023102), we get a palindrome (3238746478323).

The spelling of 2013203455221 in words is "two trillion, thirteen billion, two hundred three million, four hundred fifty-five thousand, two hundred twenty-one".