1001200021022 has 4 divisors (see below), whose sum is σ = 1501800031536. Its totient is φ = 500600010510.

The previous prime is 1001200020967. The next prime is 1001200021027. The reversal of 1001200021022 is 2201200021001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001200020994 and 1001200021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200021027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250300005254 + ... + 250300005257.

It is an arithmetic number, because the mean of its divisors is an integer number (375450007884).

Almost surely, 2^{1001200021022} is an apocalyptic number.

1001200021022 is a deficient number, since it is larger than the sum of its proper divisors (500600010514).

1001200021022 is an equidigital number, since it uses as much as digits as its factorization.

1001200021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500600010513.

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

Adding to 1001200021022 its reverse (2201200021001), we get a palindrome (3202400042023).

The spelling of 1001200021022 in words is "one trillion, one billion, two hundred million, twenty-one thousand, twenty-two".