100212100012221 has 32 divisors (see below), whose sum is σ = 139305040551936. Its totient is φ = 64009782600000.

The previous prime is 100212100012217. The next prime is 100212100012231. The reversal of 100212100012221 is 122210001212001.

It is not a de Polignac number, because 100212100012221 - 2² = 100212100012217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100212100012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212100012231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8955090 + ... + 16751651.

It is an arithmetic number, because the mean of its divisors is an integer number (4353282517248).

Almost surely, 2^{100212100012221} is an apocalyptic number.

It is an amenable number.

100212100012221 is a deficient number, since it is larger than the sum of its proper divisors (39092940539715).

100212100012221 is a wasteful number, since it uses less digits than its factorization.

100212100012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25707193.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100212100012221 its reverse (122210001212001), we get a palindrome (222422101224222).

The spelling of 100212100012221 in words is "one hundred trillion, two hundred twelve billion, one hundred million, twelve thousand, two hundred twenty-one".