20001022111 has 8 divisors (see below), whose sum is σ = 23852150784. Its totient is φ = 16398353400.

The previous prime is 20001022103. The next prime is 20001022117. The reversal of 20001022111 is 11122010002.

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 20001022111 - 2³ = 20001022103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001022117) 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, 62114815 + ... + 62115136.

It is an arithmetic number, because the mean of its divisors is an integer number (2981518848).

Almost surely, 2^20001022111 is an apocalyptic number.

20001022111 is a deficient number, since it is larger than the sum of its proper divisors (3851128673).

20001022111 is a wasteful number, since it uses less digits than its factorization.

20001022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124229981.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001022111 its reverse (11122010002), we get a palindrome (31123032113).

The spelling of 20001022111 in words is "twenty billion, one million, twenty-two thousand, one hundred eleven".