1001122100021 has 16 divisors (see below), whose sum is σ = 1078475931648. Its totient is φ = 926594526000.

The previous prime is 1001122099993. The next prime is 1001122100023. The reversal of 1001122100021 is 1200012211001.

It is a de Polignac number, because none of the positive numbers 2^k-1001122100021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1001122099975 and 1001122100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122100023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6242996 + ... + 6401346.

It is an arithmetic number, because the mean of its divisors is an integer number (67404745728).

Almost surely, 2^{1001122100021} is an apocalyptic number.

It is an amenable number.

1001122100021 is a deficient number, since it is larger than the sum of its proper divisors (77353831627).

1001122100021 is a wasteful number, since it uses less digits than its factorization.

1001122100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167272.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001122100021 its reverse (1200012211001), we get a palindrome (2201134311022).

The spelling of 1001122100021 in words is "one trillion, one billion, one hundred twenty-two million, one hundred thousand, twenty-one".