2221312130021 has 8 divisors (see below), whose sum is σ = 2352158690904. Its totient is φ = 2090485696000.

The previous prime is 2221312129999. The next prime is 2221312130027. The reversal of 2221312130021 is 1200312131222.

It can be written as a sum of positive squares in 4 ways, for example, as 30246079396 + 2191066050625 = 173914^2 + 1480225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221312130021 - 2¹⁴ = 2221312113637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221312129975 and 2221312130002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221312130027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4804190 + ... + 5246223.

It is an arithmetic number, because the mean of its divisors is an integer number (294019836363).

Almost surely, 2^{2221312130021} is an apocalyptic number.

It is an amenable number.

2221312130021 is a deficient number, since it is larger than the sum of its proper divisors (130846560883).

2221312130021 is a wasteful number, since it uses less digits than its factorization.

2221312130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063431.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2221312130021 its reverse (1200312131222), we get a palindrome (3421624261243).

The spelling of 2221312130021 in words is "two trillion, two hundred twenty-one billion, three hundred twelve million, one hundred thirty thousand, twenty-one".