1000022211221 has 16 divisors (see below), whose sum is σ = 1159499927040. Its totient is φ = 852901351920.

The previous prime is 1000022211211. The next prime is 1000022211319. The reversal of 1000022211221 is 1221122200001.

It is a cyclic number.

It is not a de Polignac number, because 1000022211221 - 2¹⁸ = 1000021949077 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 = 1000022211196 and 1000022211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000022211211) 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, 23205635 + ... + 23248688.

It is an arithmetic number, because the mean of its divisors is an integer number (72468745440).

Almost surely, 2^{1000022211221} is an apocalyptic number.

1000022211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000022211221 is a deficient number, since it is larger than the sum of its proper divisors (159477715819).

1000022211221 is a wasteful number, since it uses less digits than its factorization.

1000022211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46454456.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1000022211221 its reverse (1221122200001), we get a palindrome (2221144411222).

The spelling of 1000022211221 in words is "one trillion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".