10111211111121 has 8 divisors (see below), whose sum is σ = 13481749403520. Its totient is φ = 6740740113072.

The previous prime is 10111211111107. The next prime is 10111211111189. The reversal of 10111211111121 is 12111111211101.

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 10111211111121 - 2¹³ = 10111211102929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10111211111121.

It is not an unprimeable number, because it can be changed into a prime (10111211131121) 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, 16471945 + ... + 17074758.

It is an arithmetic number, because the mean of its divisors is an integer number (1685218675440).

Almost surely, 2^{10111211111121} is an apocalyptic number.

It is an amenable number.

10111211111121 is a deficient number, since it is larger than the sum of its proper divisors (3370538292399).

10111211111121 is a wasteful number, since it uses less digits than its factorization.

10111211111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33647175.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 10111211111121 its reverse (12111111211101), we get a palindrome (22222322322222).

The spelling of 10111211111121 in words is "ten trillion, one hundred eleven billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty-one".