1000120120121 has 16 divisors (see below), whose sum is σ = 1055808768000. Its totient is φ = 944737976448.

The previous prime is 1000120120033. The next prime is 1000120120133. The reversal of 1000120120121 is 1210210210001.

It is not a de Polignac number, because 1000120120121 - 2³⁸ = 725242213177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000120120141) 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, 28195205 + ... + 28230653.

It is an arithmetic number, because the mean of its divisors is an integer number (65988048000).

Almost surely, 2^{1000120120121} is an apocalyptic number.

It is an amenable number.

1000120120121 is a deficient number, since it is larger than the sum of its proper divisors (55688647879).

1000120120121 is a wasteful number, since it uses less digits than its factorization.

1000120120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39728.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1000120120121 its reverse (1210210210001), we get a palindrome (2210330330122).

The spelling of 1000120120121 in words is "one trillion, one hundred twenty million, one hundred twenty thousand, one hundred twenty-one".