1000211222221 has 8 divisors (see below), whose sum is σ = 1006375969760. Its totient is φ = 994046822352.

The previous prime is 1000211222207. The next prime is 1000211222237. The reversal of 1000211222221 is 1222221120001.

It is a happy number.

1000211222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1000211222221 - 2³⁵ = 965851483853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000211222195 and 1000211222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000211222251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7984015 + ... + 8108323.

It is an arithmetic number, because the mean of its divisors is an integer number (125796996220).

Almost surely, 2^{1000211222221} is an apocalyptic number.

It is an amenable number.

1000211222221 is a deficient number, since it is larger than the sum of its proper divisors (6164747539).

1000211222221 is a wasteful number, since it uses less digits than its factorization.

1000211222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173835.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1000211222221 its reverse (1222221120001), we get a palindrome (2222432342222).

The spelling of 1000211222221 in words is "one trillion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".