121212020101 has 4 divisors (see below), whose sum is σ = 121549658400. Its totient is φ = 120874381804.

The previous prime is 121212020081. The next prime is 121212020123. The reversal of 121212020101 is 101020212121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121212020101 - 2¹³ = 121212011909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168818611 + ... + 168819328.

It is an arithmetic number, because the mean of its divisors is an integer number (30387414600).

Almost surely, 2^121212020101 is an apocalyptic number.

It is an amenable number.

121212020101 is a deficient number, since it is larger than the sum of its proper divisors (337638299).

121212020101 is an equidigital number, since it uses as much as digits as its factorization.

121212020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337638298.

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

Adding to 121212020101 its reverse (101020212121), we get a palindrome (222232232222).

It can be divided in two parts, 121212020 and 101, that added together give a palindrome (121212121).

The spelling of 121212020101 in words is "one hundred twenty-one billion, two hundred twelve million, twenty thousand, one hundred one".