20211011110121 has 4 divisors (see below), whose sum is σ = 21765704272452. Its totient is φ = 18656317947792.

The previous prime is 20211011110091. The next prime is 20211011110141. The reversal of 20211011110121 is 12101111011202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11098225960000 + 9112785150121 = 3331400^2 + 3018739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211011110121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211011110096 and 20211011110105.

It is not an unprimeable number, because it can be changed into a prime (20211011110141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777346581146 + ... + 777346581171.

It is an arithmetic number, because the mean of its divisors is an integer number (5441426068113).

Almost surely, 2^{20211011110121} is an apocalyptic number.

It is an amenable number.

20211011110121 is a deficient number, since it is larger than the sum of its proper divisors (1554693162331).

20211011110121 is a wasteful number, since it uses less digits than its factorization.

20211011110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554693162330.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20211011110121 its reverse (12101111011202), we get a palindrome (32312122121323).

The spelling of 20211011110121 in words is "twenty trillion, two hundred eleven billion, eleven million, one hundred ten thousand, one hundred twenty-one".