20101021110 has 24 divisors (see below), whose sum is σ = 52262655120. Its totient is φ = 5360272272.

The previous prime is 20101021103. The next prime is 20101021181. The reversal of 20101021110 is 1112010102.

It is a happy number.

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 = 20101021092 and 20101021101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111672250 + ... + 111672429.

It is an arithmetic number, because the mean of its divisors is an integer number (2177610630).

Almost surely, 2^20101021110 is an apocalyptic number.

20101021110 is an abundant number, since it is smaller than the sum of its proper divisors (32161634010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101021110 is a wasteful number, since it uses less digits than its factorization.

20101021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223344692 (or 223344689 counting only the distinct ones).

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

Adding to 20101021110 its reverse (1112010102), we get a palindrome (21213031212).

The spelling of 20101021110 in words is "twenty billion, one hundred one million, twenty-one thousand, one hundred ten".