1001022012021 has 4 divisors (see below), whose sum is σ = 1334696016032. Its totient is φ = 667348008012.

The previous prime is 1001022011981. The next prime is 1001022012037. The reversal of 1001022012021 is 1202102201001.

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 not a de Polignac number, because 1001022012021 - 2¹⁵ = 1001021979253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001022011988 and 1001022012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001022012061) 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, 166837002001 + ... + 166837002006.

It is an arithmetic number, because the mean of its divisors is an integer number (333674004008).

Almost surely, 2^{1001022012021} is an apocalyptic number.

It is an amenable number.

1001022012021 is a deficient number, since it is larger than the sum of its proper divisors (333674004011).

1001022012021 is an equidigital number, since it uses as much as digits as its factorization.

1001022012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333674004010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1001022012021 its reverse (1202102201001), we get a palindrome (2203124213022).

The spelling of 1001022012021 in words is "one trillion, one billion, twenty-two million, twelve thousand, twenty-one".