120001022001 has 36 divisors (see below), whose sum is σ = 202222480512. Its totient is φ = 68571926136.

The previous prime is 120001021939. The next prime is 120001022003. The reversal of 120001022001 is 100220100021.

It is not a de Polignac number, because 120001022001 - 2⁶ = 120001021937 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (120001022003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 245401 + ... + 547926.

Almost surely, 2^120001022001 is an apocalyptic number.

It is an amenable number.

120001022001 is a deficient number, since it is larger than the sum of its proper divisors (82221458511).

120001022001 is an frugal number, since it uses more digits than its factorization.

120001022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793368 (or 793337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120001022001 its reverse (100220100021), we get a palindrome (220221122022).

The spelling of 120001022001 in words is "one hundred twenty billion, one million, twenty-two thousand, one".