120121001001 has 12 divisors (see below), whose sum is σ = 179934339312. Its totient is φ = 80080667172.

The previous prime is 120121000997. The next prime is 120121001111. The reversal of 120121001001 is 100100121021.

It is a happy number.

It is not a de Polignac number, because 120121001001 - 2² = 120121000997 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 (120121001801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247162311 + ... + 247162796.

It is an arithmetic number, because the mean of its divisors is an integer number (14994528276).

Almost surely, 2^120121001001 is an apocalyptic number.

It is an amenable number.

120121001001 is a deficient number, since it is larger than the sum of its proper divisors (59813338311).

120121001001 is an frugal number, since it uses more digits than its factorization.

120121001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494325122 (or 494325110 counting only the distinct ones).

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

Adding to 120121001001 its reverse (100100121021), we get a palindrome (220221122022).

The spelling of 120121001001 in words is "one hundred twenty billion, one hundred twenty-one million, one thousand, one".