20001130121 has 24 divisors (see below), whose sum is σ = 24515681760. Its totient is φ = 16225272000.

The previous prime is 20001130109. The next prime is 20001130129. The reversal of 20001130121 is 12103110002.

It is not a de Polignac number, because 20001130121 - 2⁶ = 20001130057 is a prime.

It is a super-2 number, since 2×20001130121² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001130129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 968261 + ... + 988701.

It is an arithmetic number, because the mean of its divisors is an integer number (1021486740).

Almost surely, 2^20001130121 is an apocalyptic number.

It is an amenable number.

20001130121 is a deficient number, since it is larger than the sum of its proper divisors (4514551639).

20001130121 is a wasteful number, since it uses less digits than its factorization.

20001130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21525 (or 21518 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20001130121 its reverse (12103110002), we get a palindrome (32104240123).

The spelling of 20001130121 in words is "twenty billion, one million, one hundred thirty thousand, one hundred twenty-one".