1000022122021 has 8 divisors (see below), whose sum is σ = 1114083001080. Its totient is φ = 891266400192.

The previous prime is 1000022122013. The next prime is 1000022122093. The reversal of 1000022122021 is 1202212200001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 133188502500 + 866833619521 = 364950^2 + 931039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000022122021 - 2³ = 1000022122013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000022121992 and 1000022122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000022122321) 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 7 ways as a sum of consecutive naturals, for example, 1326288910 + ... + 1326289663.

It is an arithmetic number, because the mean of its divisors is an integer number (139260375135).

Almost surely, 2^{1000022122021} is an apocalyptic number.

It is an amenable number.

1000022122021 is a deficient number, since it is larger than the sum of its proper divisors (114060879059).

1000022122021 is a wasteful number, since it uses less digits than its factorization.

1000022122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652578615.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1000022122021 its reverse (1202212200001), we get a palindrome (2202234322022).

The spelling of 1000022122021 in words is "one trillion, twenty-two million, one hundred twenty-two thousand, twenty-one".