2221020021121 has 16 divisors (see below), whose sum is σ = 2464413050880. Its totient is φ = 1984832398080.

The previous prime is 2221020021097. The next prime is 2221020021137. The reversal of 2221020021121 is 1211200201222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2221020021121 - 2¹⁹ = 2221019496833 is a prime.

It is a super-3 number, since 3×2221020021121³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221020021095 and 2221020021104.

It is not an unprimeable number, because it can be changed into a prime (2221020021161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7140616 + ... + 7445161.

It is an arithmetic number, because the mean of its divisors is an integer number (154025815680).

Almost surely, 2^{2221020021121} is an apocalyptic number.

It is an amenable number.

2221020021121 is a deficient number, since it is larger than the sum of its proper divisors (243393029759).

2221020021121 is a wasteful number, since it uses less digits than its factorization.

2221020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14586024.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2221020021121 its reverse (1211200201222), we get a palindrome (3432220222343).

The spelling of 2221020021121 in words is "two trillion, two hundred twenty-one billion, twenty million, twenty-one thousand, one hundred twenty-one".