120021001101 has 16 divisors (see below), whose sum is σ = 178059707200. Its totient is φ = 79901133264.

The previous prime is 120021001099. The next prime is 120021001109. The reversal of 120021001101 is 101100120021.

It is a happy number.

It is not a de Polignac number, because 120021001101 - 2¹ = 120021001099 is a prime.

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 (120021001109) 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, 3115711 + ... + 3153996.

It is an arithmetic number, because the mean of its divisors is an integer number (11128731700).

Almost surely, 2^120021001101 is an apocalyptic number.

It is an amenable number.

120021001101 is a deficient number, since it is larger than the sum of its proper divisors (58038706099).

120021001101 is an equidigital number, since it uses as much as digits as its factorization.

120021001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270425 (or 6270419 counting only the distinct ones).

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

Adding to 120021001101 its reverse (101100120021), we get a palindrome (221121121122).

The spelling of 120021001101 in words is "one hundred twenty billion, twenty-one million, one thousand, one hundred one".