121212100101 has 32 divisors (see below), whose sum is σ = 164879193600. Its totient is φ = 79195184640.

The previous prime is 121212100049. The next prime is 121212100171. The reversal of 121212100101 is 101001212121.

It is not a de Polignac number, because 121212100101 - 2⁷ = 121212099973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212100171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18063735 + ... + 18070443.

It is an arithmetic number, because the mean of its divisors is an integer number (5152474800).

Almost surely, 2^121212100101 is an apocalyptic number.

It is an amenable number.

121212100101 is a deficient number, since it is larger than the sum of its proper divisors (43667093499).

121212100101 is a wasteful number, since it uses less digits than its factorization.

121212100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7389.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121212100101 its reverse (101001212121), we get a palindrome (222213312222).

The spelling of 121212100101 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred thousand, one hundred one".