210001102101 has 12 divisors (see below), whose sum is σ = 346668486112. Its totient is φ = 120000629736.

The previous prime is 210001102099. The next prime is 210001102109. The reversal of 210001102101 is 101201100012.

It is a happy number.

It is not a de Polignac number, because 210001102101 - 2¹ = 210001102099 is a prime.

It is a super-2 number, since 2×210001102101² (a number of 23 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001102109) 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, 1666675351 + ... + 1666675476.

Almost surely, 2^210001102101 is an apocalyptic number.

210001102101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210001102101 is a deficient number, since it is larger than the sum of its proper divisors (136667384011).

210001102101 is a wasteful number, since it uses less digits than its factorization.

210001102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333350840 (or 3333350837 counting only the distinct ones).

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

Adding to 210001102101 its reverse (101201100012), we get a palindrome (311202202113).

The spelling of 210001102101 in words is "two hundred ten billion, one million, one hundred two thousand, one hundred one".