12211121011021 has 16 divisors (see below), whose sum is σ = 13064383301760. Its totient is φ = 11385225434880.

The previous prime is 12211121011003. The next prime is 12211121011123. The reversal of 12211121011021 is 12011012111221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211121011021 is a prime.

It is a super-2 number, since 2×12211121011021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211121010986 and 12211121011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211121011421) 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, 4670175 + ... + 6799468.

It is an arithmetic number, because the mean of its divisors is an integer number (816523956360).

Almost surely, 2^{12211121011021} is an apocalyptic number.

It is an amenable number.

12211121011021 is a deficient number, since it is larger than the sum of its proper divisors (853262290739).

12211121011021 is a wasteful number, since it uses less digits than its factorization.

12211121011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11470836.

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

Adding to 12211121011021 its reverse (12011012111221), we get a palindrome (24222133122242).

The spelling of 12211121011021 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, eleven thousand, twenty-one".