11222022121 has 4 divisors (see below), whose sum is σ = 11307686544. Its totient is φ = 11136357700.

The previous prime is 11222022107. The next prime is 11222022131. The reversal of 11222022121 is 12122022211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11222022121 - 2¹⁷ = 11221891049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222022095 and 11222022104.

It is not an unprimeable number, because it can be changed into a prime (11222022101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42832015 + ... + 42832276.

It is an arithmetic number, because the mean of its divisors is an integer number (2826921636).

Almost surely, 2^11222022121 is an apocalyptic number.

It is an amenable number.

11222022121 is a deficient number, since it is larger than the sum of its proper divisors (85664423).

11222022121 is an equidigital number, since it uses as much as digits as its factorization.

11222022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85664422.

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

Adding to 11222022121 its reverse (12122022211), we get a palindrome (23344044332).

The spelling of 11222022121 in words is "eleven billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".