121212120222101 has 4 divisors (see below), whose sum is σ = 121280102344032. Its totient is φ = 121144138100172.

The previous prime is 121212120222073. The next prime is 121212120222113. The reversal of 121212120222101 is 101222021212121.

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 121212120222101 - 2²² = 121212116027797 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 (121212620222101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33991058291 + ... + 33991061856.

It is an arithmetic number, because the mean of its divisors is an integer number (30320025586008).

Almost surely, 2^{121212120222101} is an apocalyptic number.

It is an amenable number.

121212120222101 is a deficient number, since it is larger than the sum of its proper divisors (67982121931).

121212120222101 is an equidigital number, since it uses as much as digits as its factorization.

121212120222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67982121930.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121212120222101 its reverse (101222021212121), we get a palindrome (222434141434222).

The spelling of 121212120222101 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, one hundred one".