11222002121 has 4 divisors (see below), whose sum is σ = 12242184144. Its totient is φ = 10201820100.

The previous prime is 11222002087. The next prime is 11222002133. The reversal of 11222002121 is 12120022211.

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 a de Polignac number, because none of the positive numbers 2^k-11222002121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222002096 and 11222002105.

It is not an unprimeable number, because it can be changed into a prime (11222062121) 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, 510090995 + ... + 510091016.

It is an arithmetic number, because the mean of its divisors is an integer number (3060546036).

Almost surely, 2^11222002121 is an apocalyptic number.

11222002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222002121 is a deficient number, since it is larger than the sum of its proper divisors (1020182023).

11222002121 is a wasteful number, since it uses less digits than its factorization.

11222002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020182022.

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

Adding to 11222002121 its reverse (12120022211), we get a palindrome (23342024332).

The spelling of 11222002121 in words is "eleven billion, two hundred twenty-two million, two thousand, one hundred twenty-one".