221010010002121 has 8 divisors (see below), whose sum is σ = 225712559226240. Its totient is φ = 216307469469168.

The previous prime is 221010010002073. The next prime is 221010010002161. The reversal of 221010010002121 is 121200010010122.

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 221010010002121 - 2²⁷ = 221009875784393 is a prime.

It is a super-2 number, since 2×221010010002121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010010002161) 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, 94559035 + ... + 96868111.

It is an arithmetic number, because the mean of its divisors is an integer number (28214069903280).

Almost surely, 2^{221010010002121} is an apocalyptic number.

It is an amenable number.

221010010002121 is a deficient number, since it is larger than the sum of its proper divisors (4702549224119).

221010010002121 is a wasteful number, since it uses less digits than its factorization.

221010010002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345583.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221010010002121 its reverse (121200010010122), we get a palindrome (342210020012243).

The spelling of 221010010002121 in words is "two hundred twenty-one trillion, ten billion, ten million, two thousand, one hundred twenty-one".