12101211121 has 8 divisors (see below), whose sum is σ = 12186713088. Its totient is φ = 12015780000.

The previous prime is 12101211091. The next prime is 12101211127. The reversal of 12101211121 is 12111210121.

It is a happy number.

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 12101211121 - 2⁹ = 12101210609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101211127) 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, 352176 + ... + 385006.

It is an arithmetic number, because the mean of its divisors is an integer number (1523339136).

Almost surely, 2^12101211121 is an apocalyptic number.

It is an amenable number.

12101211121 is a deficient number, since it is larger than the sum of its proper divisors (85501967).

12101211121 is a wasteful number, since it uses less digits than its factorization.

12101211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35423.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12101211121 its reverse (12111210121), we get a palindrome (24212421242).

The spelling of 12101211121 in words is "twelve billion, one hundred one million, two hundred eleven thousand, one hundred twenty-one".