2221123012021 has 8 divisors (see below), whose sum is σ = 2338039660320. Its totient is φ = 2104207907472.

The previous prime is 2221123011979. The next prime is 2221123012033. The reversal of 2221123012021 is 1202103211222.

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 2221123012021 - 2²¹ = 2221120914869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221123012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221123012081) 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, 3649266 + ... + 4214188.

It is an arithmetic number, because the mean of its divisors is an integer number (292254957540).

Almost surely, 2^{2221123012021} is an apocalyptic number.

It is an amenable number.

2221123012021 is a deficient number, since it is larger than the sum of its proper divisors (116916648299).

2221123012021 is a wasteful number, since it uses less digits than its factorization.

2221123012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771875.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2221123012021 its reverse (1202103211222), we get a palindrome (3423226223243).

The spelling of 2221123012021 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-three million, twelve thousand, twenty-one".