12221022010021 has 12 divisors (see below), whose sum is σ = 13566024445932. Its totient is φ = 11000019800000.

The previous prime is 12221022010019. The next prime is 12221022010027. The reversal of 12221022010021 is 12001022012221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7460600588100 + 4760421421921 = 2731410^2 + 2181839^2 .

It is not a de Polignac number, because 12221022010021 - 2¹ = 12221022010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221022009977 and 12221022010004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221022010027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499988680 + ... + 500013121.

It is an arithmetic number, because the mean of its divisors is an integer number (1130502037161).

Almost surely, 2^{12221022010021} is an apocalyptic number.

12221022010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221022010021 is a deficient number, since it is larger than the sum of its proper divisors (1345002435911).

12221022010021 is a wasteful number, since it uses less digits than its factorization.

12221022010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000001924 (or 1000001913 counting only the distinct ones).

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

Adding to 12221022010021 its reverse (12001022012221), we get a palindrome (24222044022242).

The spelling of 12221022010021 in words is "twelve trillion, two hundred twenty-one billion, twenty-two million, ten thousand, twenty-one".