20203135121 has 16 divisors (see below), whose sum is σ = 23427532800. Its totient is φ = 17254541568.

The previous prime is 20203135109. The next prime is 20203135153. The reversal of 20203135121 is 12153130202.

It is a cyclic number.

It is not a de Polignac number, because 20203135121 - 2¹⁴ = 20203118737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20203135093 and 20203135102.

It is not an unprimeable number, because it can be changed into a prime (20203135171) 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, 761681 + ... + 787758.

It is an arithmetic number, because the mean of its divisors is an integer number (1464220800).

Almost surely, 2^20203135121 is an apocalyptic number.

It is an amenable number.

20203135121 is a deficient number, since it is larger than the sum of its proper divisors (3224397679).

20203135121 is a wasteful number, since it uses less digits than its factorization.

20203135121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549528.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20203135121 its reverse (12153130202), we get a palindrome (32356265323).

The spelling of 20203135121 in words is "twenty billion, two hundred three million, one hundred thirty-five thousand, one hundred twenty-one".