20021103111 has 8 divisors (see below), whose sum is σ = 28099793920. Its totient is φ = 12644907192.

The previous prime is 20021103103. The next prime is 20021103119. The reversal of 20021103111 is 11130112002.

It is an interprime number because it is at equal distance from previous prime (20021103103) and next prime (20021103119).

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

It is not a de Polignac number, because 20021103111 - 2³ = 20021103103 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 (20021103119) 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, 175623655 + ... + 175623768.

It is an arithmetic number, because the mean of its divisors is an integer number (3512474240).

Almost surely, 2^20021103111 is an apocalyptic number.

20021103111 is a deficient number, since it is larger than the sum of its proper divisors (8078690809).

20021103111 is a wasteful number, since it uses less digits than its factorization.

20021103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351247445.

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

Adding to 20021103111 its reverse (11130112002), we get a palindrome (31151215113).

The spelling of 20021103111 in words is "twenty billion, twenty-one million, one hundred three thousand, one hundred eleven".