20101121110 has 16 divisors (see below), whose sum is σ = 41350877856. Its totient is φ = 6891812928.

The previous prime is 20101121093. The next prime is 20101121143. The reversal of 20101121110 is 1112110102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143579367 + ... + 143579506.

It is an arithmetic number, because the mean of its divisors is an integer number (2584429866).

Almost surely, 2^20101121110 is an apocalyptic number.

20101121110 is an abundant number, since it is smaller than the sum of its proper divisors (21249756746).

20101121110 is a wasteful number, since it uses less digits than its factorization.

20101121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287158887.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20101121110 its reverse (1112110102), we get a palindrome (21213231212).

The spelling of 20101121110 in words is "twenty billion, one hundred one million, one hundred twenty-one thousand, one hundred ten".