2221021011121 has 4 divisors (see below), whose sum is σ = 2422932012144. Its totient is φ = 2019110010100.

The previous prime is 2221021011109. The next prime is 2221021011133. The reversal of 2221021011121 is 1211101201222.

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 an interprime number because it is at equal distance from previous prime (2221021011109) and next prime (2221021011133).

It is a cyclic number.

It is not a de Polignac number, because 2221021011121 - 2¹³ = 2221021002929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221021011095 and 2221021011104.

It is not an unprimeable number, because it can be changed into a prime (2221021051121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100955500495 + ... + 100955500516.

It is an arithmetic number, because the mean of its divisors is an integer number (605733003036).

Almost surely, 2^{2221021011121} is an apocalyptic number.

It is an amenable number.

2221021011121 is a deficient number, since it is larger than the sum of its proper divisors (201911001023).

2221021011121 is a wasteful number, since it uses less digits than its factorization.

2221021011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201911001022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2221021011121 its reverse (1211101201222), we get a palindrome (3432122212343).

The spelling of 2221021011121 in words is "two trillion, two hundred twenty-one billion, twenty-one million, eleven thousand, one hundred twenty-one".