20021041111 has 8 divisors (see below), whose sum is σ = 20184850944. Its totient is φ = 19857327840.

The previous prime is 20021041097. The next prime is 20021041181. The reversal of 20021041111 is 11114012002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021041111 - 2¹¹ = 20021039063 is a prime.

It is a super-2 number, since 2×20021041111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021041091 and 20021041100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021041181) 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, 426381 + ... + 471001.

It is an arithmetic number, because the mean of its divisors is an integer number (2523106368).

Almost surely, 2^20021041111 is an apocalyptic number.

20021041111 is a deficient number, since it is larger than the sum of its proper divisors (163809833).

20021041111 is a wasteful number, since it uses less digits than its factorization.

20021041111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48281.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021041111 its reverse (11114012002), we get a palindrome (31135053113).

The spelling of 20021041111 in words is "twenty billion, twenty-one million, forty-one thousand, one hundred eleven".