20112011001 has 12 divisors (see below), whose sum is σ = 29062528560. Its totient is φ = 13402539960.

The previous prime is 20112010999. The next prime is 20112011011. The reversal of 20112011001 is 10011021102.

It is a happy number.

It is not a de Polignac number, because 20112011001 - 2¹ = 20112010999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20112011011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432255 + ... + 476516.

It is an arithmetic number, because the mean of its divisors is an integer number (2421877380).

Almost surely, 2^20112011001 is an apocalyptic number.

It is an amenable number.

20112011001 is a deficient number, since it is larger than the sum of its proper divisors (8950517559).

20112011001 is a wasteful number, since it uses less digits than its factorization.

20112011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911236 (or 911233 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20112011001 its reverse (10011021102), we get a palindrome (30123032103).

The spelling of 20112011001 in words is "twenty billion, one hundred twelve million, eleven thousand, one".