12220012012021 has 16 divisors (see below), whose sum is σ = 13346165533248. Its totient is φ = 11096404070400.

The previous prime is 12220012011943. The next prime is 12220012012057. The reversal of 12220012012021 is 12021021002221.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12220012012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220012011986 and 12220012012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220012012421) 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, 49548405 + ... + 49794421.

It is an arithmetic number, because the mean of its divisors is an integer number (834135345828).

Almost surely, 2^{12220012012021} is an apocalyptic number.

12220012012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220012012021 is a deficient number, since it is larger than the sum of its proper divisors (1126153521227).

12220012012021 is a wasteful number, since it uses less digits than its factorization.

12220012012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251172.

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

Adding to 12220012012021 its reverse (12021021002221), we get a palindrome (24241033014242).

The spelling of 12220012012021 in words is "twelve trillion, two hundred twenty billion, twelve million, twelve thousand, twenty-one".