221010210212021 has 8 divisors (see below), whose sum is σ = 229908521512800. Its totient is φ = 212197050215920.

The previous prime is 221010210212009. The next prime is 221010210212081. The reversal of 221010210212021 is 120212012010122.

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 221010210212021 - 2¹⁰ = 221010210210997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010210212081) 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, 21287820875 + ... + 21287831256.

It is an arithmetic number, because the mean of its divisors is an integer number (28738565189100).

Almost surely, 2^{221010210212021} is an apocalyptic number.

It is an amenable number.

221010210212021 is a deficient number, since it is larger than the sum of its proper divisors (8898311300779).

221010210212021 is a wasteful number, since it uses less digits than its factorization.

221010210212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42575652339.

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

Adding to 221010210212021 its reverse (120212012010122), we get a palindrome (341222222222143).

The spelling of 221010210212021 in words is "two hundred twenty-one trillion, ten billion, two hundred ten million, two hundred twelve thousand, twenty-one".