20100311121 has 16 divisors (see below), whose sum is σ = 29389897728. Its totient is φ = 12118222800.

The previous prime is 20100311089. The next prime is 20100311129. The reversal of 20100311121 is 12111300102.

It is not a de Polignac number, because 20100311121 - 2⁵ = 20100311089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20100311097 and 20100311106.

It is not an unprimeable number, because it can be changed into a prime (20100311129) 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, 1588201 + ... + 1600806.

It is an arithmetic number, because the mean of its divisors is an integer number (1836868608).

Almost surely, 2^20100311121 is an apocalyptic number.

It is an amenable number.

20100311121 is a deficient number, since it is larger than the sum of its proper divisors (9289586607).

20100311121 is a wasteful number, since it uses less digits than its factorization.

20100311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189212.

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

Adding to 20100311121 its reverse (12111300102), we get a palindrome (32211611223).

The spelling of 20100311121 in words is "twenty billion, one hundred million, three hundred eleven thousand, one hundred twenty-one".