1022002000121 has 4 divisors (see below), whose sum is σ = 1082119764852. Its totient is φ = 961884235392.

The previous prime is 1022002000079. The next prime is 1022002000153. The reversal of 1022002000121 is 1210002002201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 817331716096 + 204670284025 = 904064^2 + 452405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022002000121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022002005121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30058882340 + ... + 30058882373.

It is an arithmetic number, because the mean of its divisors is an integer number (270529941213).

Almost surely, 2^{1022002000121} is an apocalyptic number.

It is an amenable number.

1022002000121 is a deficient number, since it is larger than the sum of its proper divisors (60117764731).

1022002000121 is an equidigital number, since it uses as much as digits as its factorization.

1022002000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60117764730.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1022002000121 its reverse (1210002002201), we get a palindrome (2232004002322).

The spelling of 1022002000121 in words is "one trillion, twenty-two billion, two million, one hundred twenty-one", and thus it is an aban number.