20211110121 has 8 divisors (see below), whose sum is σ = 26955836224. Its totient is φ = 13470228720.

The previous prime is 20211110119. The next prime is 20211110147. The reversal of 20211110121 is 12101111202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20211110121 - 2¹ = 20211110119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211110097 and 20211110106.

It is not an unprimeable number, because it can be changed into a prime (20211110191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948886 + ... + 969951.

It is an arithmetic number, because the mean of its divisors is an integer number (3369479528).

Almost surely, 2^20211110121 is an apocalyptic number.

It is an amenable number.

20211110121 is a deficient number, since it is larger than the sum of its proper divisors (6744726103).

20211110121 is a wasteful number, since it uses less digits than its factorization.

20211110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20211110121 its reverse (12101111202), we get a palindrome (32312221323).

The spelling of 20211110121 in words is "twenty billion, two hundred eleven million, one hundred ten thousand, one hundred twenty-one".