221210102011021 has 8 divisors (see below), whose sum is σ = 228549247418624. Its totient is φ = 213883665082560.

The previous prime is 221210102011013. The next prime is 221210102011039. The reversal of 221210102011021 is 120110201012122.

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 221210102011021 - 2³ = 221210102011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221210102010986 and 221210102011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210102011001) 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, 3177084396 + ... + 3177154021.

It is an arithmetic number, because the mean of its divisors is an integer number (28568655927328).

Almost surely, 2^{221210102011021} is an apocalyptic number.

It is an amenable number.

221210102011021 is a deficient number, since it is larger than the sum of its proper divisors (7339145407603).

221210102011021 is a wasteful number, since it uses less digits than its factorization.

221210102011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354239571.

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

Adding to 221210102011021 its reverse (120110201012122), we get a palindrome (341320303023143).

The spelling of 221210102011021 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred two million, eleven thousand, twenty-one".