121111212106 has 8 divisors (see below), whose sum is σ = 181701052740. Its totient is φ = 60544194528.

The previous prime is 121111212091. The next prime is 121111212107. The reversal of 121111212106 is 601212111121.

It can be written as a sum of positive squares in 2 ways, for example, as 115525891881 + 5585320225 = 339891^2 + 74735^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121111212107) 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, 5692491 + ... + 5713726.

Almost surely, 2^121111212106 is an apocalyptic number.

121111212106 is a deficient number, since it is larger than the sum of its proper divisors (60589840634).

121111212106 is a wasteful number, since it uses less digits than its factorization.

121111212106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411528.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 121111212106 its reverse (601212111121), we get a palindrome (722323323227).

The spelling of 121111212106 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one hundred six".