121112212101 has 8 divisors (see below), whose sum is σ = 161502653760. Its totient is φ = 80731622592.

The previous prime is 121112212099. The next prime is 121112212153. The reversal of 121112212101 is 101212211121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121112212101 - 2¹ = 121112212099 is a prime.

It is a super-2 number, since 2×121112212101² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112219101) 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, 2434305 + ... + 2483558.

It is an arithmetic number, because the mean of its divisors is an integer number (20187831720).

Almost surely, 2^121112212101 is an apocalyptic number.

It is an amenable number.

121112212101 is a deficient number, since it is larger than the sum of its proper divisors (40390441659).

121112212101 is an equidigital number, since it uses as much as digits as its factorization.

121112212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926075.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121112212101 its reverse (101212211121), we get a palindrome (222324423222).

The spelling of 121112212101 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred one".