1001122020121 has 4 divisors (see below), whose sum is σ = 1001124943632. Its totient is φ = 1001119096612.

The previous prime is 1001122020097. The next prime is 1001122020131. The reversal of 1001122020121 is 1210202211001.

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 1001122020121 - 2¹⁹ = 1001121495833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001122020131) 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, 867595 + ... + 1659808.

It is an arithmetic number, because the mean of its divisors is an integer number (250281235908).

Almost surely, 2^{1001122020121} is an apocalyptic number.

It is an amenable number.

1001122020121 is a deficient number, since it is larger than the sum of its proper divisors (2923511).

1001122020121 is an equidigital number, since it uses as much as digits as its factorization.

1001122020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923510.

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

Adding to 1001122020121 its reverse (1210202211001), we get a palindrome (2211324231122).

The spelling of 1001122020121 in words is "one trillion, one billion, one hundred twenty-two million, twenty thousand, one hundred twenty-one".