2212221021021 has 24 divisors (see below), whose sum is σ = 3485986152480. Its totient is φ = 1340716120800.

The previous prime is 2212221021011. The next prime is 2212221021067. The reversal of 2212221021021 is 1201201222122.

It is a happy number.

2212221021021 is a `hidden beast` number, since 2 + 212 + 221 + 0 + 210 + 21 = 666.

It is not a de Polignac number, because 2212221021021 - 2²¹ = 2212218923869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212221020985 and 2212221021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212221021011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6526006 + ... + 6856616.

It is an arithmetic number, because the mean of its divisors is an integer number (145249423020).

Almost surely, 2^{2212221021021} is an apocalyptic number.

It is an amenable number.

2212221021021 is a deficient number, since it is larger than the sum of its proper divisors (1273765131459).

2212221021021 is a wasteful number, since it uses less digits than its factorization.

2212221021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398217 (or 398214 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2212221021021 its reverse (1201201222122), we get a palindrome (3413422243143).

The spelling of 2212221021021 in words is "two trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, twenty-one".