100212101221 has 8 divisors (see below), whose sum is σ = 100835041824. Its totient is φ = 99589260240.

The previous prime is 100212101219. The next prime is 100212101251. The reversal of 100212101221 is 122101212001.

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 100212101221 - 2¹ = 100212101219 is a prime.

It is a super-2 number, since 2×100212101221² (a number of 23 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 (100212101251) 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, 3838191 + ... + 3864211.

It is an arithmetic number, because the mean of its divisors is an integer number (12604380228).

Almost surely, 2^100212101221 is an apocalyptic number.

It is an amenable number.

100212101221 is a deficient number, since it is larger than the sum of its proper divisors (622940603).

100212101221 is a wasteful number, since it uses less digits than its factorization.

100212101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49811.

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

Adding to 100212101221 its reverse (122101212001), we get a palindrome (222313313222).

The spelling of 100212101221 in words is "one hundred billion, two hundred twelve million, one hundred one thousand, two hundred twenty-one".