11112022121 has 8 divisors (see below), whose sum is σ = 11238785544. Its totient is φ = 10985587200.

The previous prime is 11112022091. The next prime is 11112022123. The reversal of 11112022121 is 12122021111.

It can be written as a sum of positive squares in 4 ways, for example, as 2669168896 + 8442853225 = 51664^2 + 91885^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112022096 and 11112022105.

It is not an unprimeable number, because it can be changed into a prime (11112022123) 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, 13766 + ... + 149711.

It is an arithmetic number, because the mean of its divisors is an integer number (1404848193).

Almost surely, 2^11112022121 is an apocalyptic number.

It is an amenable number.

11112022121 is a deficient number, since it is larger than the sum of its proper divisors (126763423).

11112022121 is a wasteful number, since it uses less digits than its factorization.

11112022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164251.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11112022121 its reverse (12122021111), we get a palindrome (23234043232).

The spelling of 11112022121 in words is "eleven billion, one hundred twelve million, twenty-two thousand, one hundred twenty-one".