1012001022121 has 4 divisors (see below), whose sum is σ = 1012045024144. Its totient is φ = 1011957020100.

The previous prime is 1012001022103. The next prime is 1012001022203. The reversal of 1012001022121 is 1212201002101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012001022121 - 2³⁹ = 462245208233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012001025121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21966495 + ... + 22012516.

It is an arithmetic number, because the mean of its divisors is an integer number (253011256036).

Almost surely, 2^{1012001022121} is an apocalyptic number.

It is an amenable number.

1012001022121 is a deficient number, since it is larger than the sum of its proper divisors (44002023).

1012001022121 is an equidigital number, since it uses as much as digits as its factorization.

1012001022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44002022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012001022121 its reverse (1212201002101), we get a palindrome (2224202024222).

The spelling of 1012001022121 in words is "one trillion, twelve billion, one million, twenty-two thousand, one hundred twenty-one".