20101102011 has 12 divisors (see below), whose sum is σ = 30297313488. Its totient is φ = 12818093904.

The previous prime is 20101101997. The next prime is 20101102111. The reversal of 20101102011 is 11020110102.

It is a happy number.

It is not a de Polignac number, because 20101102011 - 2⁶ = 20101101947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 20101101984 and 20101102002.

It is not an unprimeable number, because it can be changed into a prime (20101102111) 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, 48553180 + ... + 48553593.

It is an arithmetic number, because the mean of its divisors is an integer number (2524776124).

Almost surely, 2^20101102011 is an apocalyptic number.

20101102011 is a deficient number, since it is larger than the sum of its proper divisors (10196211477).

20101102011 is a wasteful number, since it uses less digits than its factorization.

20101102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97106802 (or 97106799 counting only the distinct ones).

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

Adding to 20101102011 its reverse (11020110102), we get a palindrome (31121212113).

The spelling of 20101102011 in words is "twenty billion, one hundred one million, one hundred two thousand, eleven".