20110021111 has 8 divisors (see below), whose sum is σ = 20225620448. Its totient is φ = 19994688000.

The previous prime is 20110021103. The next prime is 20110021201. The reversal of 20110021111 is 11112001102.

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 20110021111 - 2³ = 20110021103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110021511) 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, 85951 + ... + 218191.

It is an arithmetic number, because the mean of its divisors is an integer number (2528202556).

Almost surely, 2^20110021111 is an apocalyptic number.

20110021111 is a deficient number, since it is larger than the sum of its proper divisors (115599337).

20110021111 is a wasteful number, since it uses less digits than its factorization.

20110021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133113.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20110021111 its reverse (11112001102), we get a palindrome (31222022213).

The spelling of 20110021111 in words is "twenty billion, one hundred ten million, twenty-one thousand, one hundred eleven".