20031102011011 has 16 divisors (see below), whose sum is σ = 24653777628928. Its totient is φ = 15848710970400.

The previous prime is 20031102011009. The next prime is 20031102011029. The reversal of 20031102011011 is 11011020113002.

It is a happy number.

It is not a de Polignac number, because 20031102011011 - 2¹ = 20031102011009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20031102010982 and 20031102011000.

It is not an unprimeable number, because it can be changed into a prime (20031102015011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28268716 + ... + 28968646.

It is an arithmetic number, because the mean of its divisors is an integer number (1540861101808).

Almost surely, 2^{20031102011011} is an apocalyptic number.

20031102011011 is a deficient number, since it is larger than the sum of its proper divisors (4622675617917).

20031102011011 is a wasteful number, since it uses less digits than its factorization.

20031102011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014442.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20031102011011 its reverse (11011020113002), we get a palindrome (31042122124013).

The spelling of 20031102011011 in words is "twenty trillion, thirty-one billion, one hundred two million, eleven thousand, eleven".