121221212101 has 8 divisors (see below), whose sum is σ = 132348763008. Its totient is φ = 110111568000.

The previous prime is 121221212081. The next prime is 121221212131. The reversal of 121221212101 is 101212122121.

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 121221212101 - 2⁵ = 121221212069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221212131) 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, 4462540 + ... + 4489621.

It is an arithmetic number, because the mean of its divisors is an integer number (16543595376).

Almost surely, 2^121221212101 is an apocalyptic number.

121221212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121221212101 is a deficient number, since it is larger than the sum of its proper divisors (11127550907).

121221212101 is a wasteful number, since it uses less digits than its factorization.

121221212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953403.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221212101 its reverse (101212122121), we get a palindrome (222433334222).

The spelling of 121221212101 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred one".