100212011211221 has 16 divisors (see below), whose sum is σ = 123338222550144. Its totient is φ = 79288391156544.

The previous prime is 100212011211209. The next prime is 100212011211229. The reversal of 100212011211221 is 122112110212001.

It is a cyclic number.

It is not a de Polignac number, because 100212011211221 - 2⁶ = 100212011211157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100212011211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212011211229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33721031 + ... + 36572283.

It is an arithmetic number, because the mean of its divisors is an integer number (7708638909384).

Almost surely, 2^{100212011211221} is an apocalyptic number.

It is an amenable number.

100212011211221 is a deficient number, since it is larger than the sum of its proper divisors (23126211338923).

100212011211221 is a wasteful number, since it uses less digits than its factorization.

100212011211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237500.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100212011211221 its reverse (122112110212001), we get a palindrome (222324121423222).

The spelling of 100212011211221 in words is "one hundred trillion, two hundred twelve billion, eleven million, two hundred eleven thousand, two hundred twenty-one".