2221100012021 has 4 divisors (see below), whose sum is σ = 2423018194944. Its totient is φ = 2019181829100.

The previous prime is 2221100012009. The next prime is 2221100012029. The reversal of 2221100012021 is 1202100011222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221100012021 - 2¹⁸ = 2221099749877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221100011987 and 2221100012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221100012029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100959091445 + ... + 100959091466.

It is an arithmetic number, because the mean of its divisors is an integer number (605754548736).

Almost surely, 2^{2221100012021} is an apocalyptic number.

It is an amenable number.

2221100012021 is a deficient number, since it is larger than the sum of its proper divisors (201918182923).

2221100012021 is a wasteful number, since it uses less digits than its factorization.

2221100012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201918182922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2221100012021 its reverse (1202100011222), we get a palindrome (3423200023243).

The spelling of 2221100012021 in words is "two trillion, two hundred twenty-one billion, one hundred million, twelve thousand, twenty-one".