20011102101 has 48 divisors (see below), whose sum is σ = 31456833408. Its totient is φ = 12208665600.

The previous prime is 20011102099. The next prime is 20011102103. The reversal of 20011102101 is 10120111002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20011102099) and next prime (20011102103).

It is not a de Polignac number, because 20011102101 - 2¹ = 20011102099 is a prime.

It is a super-2 number, since 2×20011102101² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011102103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1920616 + ... + 1931006.

It is an arithmetic number, because the mean of its divisors is an integer number (655350696).

Almost surely, 2^20011102101 is an apocalyptic number.

It is an amenable number.

20011102101 is a deficient number, since it is larger than the sum of its proper divisors (11445731307).

20011102101 is a wasteful number, since it uses less digits than its factorization.

20011102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10762 (or 10759 counting only the distinct ones).

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

Adding to 20011102101 its reverse (10120111002), we get a palindrome (30131213103).

The spelling of 20011102101 in words is "twenty billion, eleven million, one hundred two thousand, one hundred one".