121212102101 has 8 divisors (see below), whose sum is σ = 130446197784. Its totient is φ = 112211781120.

The previous prime is 121212102049. The next prime is 121212102113. The reversal of 121212102101 is 101201212121.

It can be written as a sum of positive squares in 4 ways, for example, as 2524962001 + 118687140100 = 50249^2 + 344510^2 .

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 121212102101 - 2¹⁰ = 121212101077 is a prime.

It is a super-2 number, since 2×121212102101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212102161) 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, 58442600 + ... + 58444673.

It is an arithmetic number, because the mean of its divisors is an integer number (16305774723).

Almost surely, 2^121212102101 is an apocalyptic number.

It is an amenable number.

121212102101 is a deficient number, since it is larger than the sum of its proper divisors (9234095683).

121212102101 is a wasteful number, since it uses less digits than its factorization.

121212102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116887351.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212102101 its reverse (101201212121), we get a palindrome (222413314222).

The spelling of 121212102101 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred two thousand, one hundred one".