221022100121021 has 8 divisors (see below), whose sum is σ = 226424780906688. Its totient is φ = 215619985900000.

The previous prime is 221022100121003. The next prime is 221022100121111. The reversal of 221022100121021 is 120121001220122.

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 221022100121021 - 2³⁴ = 221004920251837 is a prime.

It is a super-2 number, since 2×221022100121021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022100181021) 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, 140851355 + ... + 142411896.

It is an arithmetic number, because the mean of its divisors is an integer number (28303097613336).

Almost surely, 2^{221022100121021} is an apocalyptic number.

It is an amenable number.

221022100121021 is a deficient number, since it is larger than the sum of its proper divisors (5402680785667).

221022100121021 is a wasteful number, since it uses less digits than its factorization.

221022100121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283282323.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022100121021 its reverse (120121001220122), we get a palindrome (341143101341143).

The spelling of 221022100121021 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred million, one hundred twenty-one thousand, twenty-one".