210120001101 has 16 divisors (see below), whose sum is σ = 311597443200. Its totient is φ = 139941152064.

The previous prime is 210120001099. The next prime is 210120001103. The reversal of 210120001101 is 101100021012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210120001099) and next prime (210120001103).

It is not a de Polignac number, because 210120001101 - 2¹ = 210120001099 is a prime.

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 (210120001103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829161 + ... + 3883646.

It is an arithmetic number, because the mean of its divisors is an integer number (19474840200).

Almost surely, 2^210120001101 is an apocalyptic number.

It is an amenable number.

210120001101 is a deficient number, since it is larger than the sum of its proper divisors (101477442099).

210120001101 is a wasteful number, since it uses less digits than its factorization.

210120001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713825 (or 7713819 counting only the distinct ones).

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

Adding to 210120001101 its reverse (101100021012), we get a palindrome (311220022113).

The spelling of 210120001101 in words is "two hundred ten billion, one hundred twenty million, one thousand, one hundred one".