1002001120121 has 16 divisors (see below), whose sum is σ = 1056199098240. Its totient is φ = 947950174080.

The previous prime is 1002001120111. The next prime is 1002001120129. The reversal of 1002001120121 is 1210211002001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002001120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002001120129) 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, 44441111 + ... + 44463651.

It is an arithmetic number, because the mean of its divisors is an integer number (66012443640).

Almost surely, 2^{1002001120121} is an apocalyptic number.

It is an amenable number.

1002001120121 is a deficient number, since it is larger than the sum of its proper divisors (54197978119).

1002001120121 is a wasteful number, since it uses less digits than its factorization.

1002001120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25696.

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

Adding to 1002001120121 its reverse (1210211002001), we get a palindrome (2212212122122).

The spelling of 1002001120121 in words is "one trillion, two billion, one million, one hundred twenty thousand, one hundred twenty-one".