20011021103 has 8 divisors (see below), whose sum is σ = 21082368000. Its totient is φ = 18941487768.

The previous prime is 20011021099. The next prime is 20011021109. The reversal of 20011021103 is 30112011002.

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 20011021103 - 2² = 20011021099 is a prime.

It is a super-2 number, since 2×20011021103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011021109) 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, 430703 + ... + 474896.

It is an arithmetic number, because the mean of its divisors is an integer number (2635296000).

Almost surely, 2^20011021103 is an apocalyptic number.

20011021103 is a deficient number, since it is larger than the sum of its proper divisors (1071346897).

20011021103 is a wasteful number, since it uses less digits than its factorization.

20011021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906781.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20011021103 its reverse (30112011002), we get a palindrome (50123032105).

The spelling of 20011021103 in words is "twenty billion, eleven million, twenty-one thousand, one hundred three".