10111211112121 has 16 divisors (see below), whose sum is σ = 11984966299648. Its totient is φ = 8347430019600.

The previous prime is 10111211112103. The next prime is 10111211112127. The reversal of 10111211112121 is 12121111211101.

It is not a de Polignac number, because 10111211112121 - 2²¹ = 10111209014969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111211112095 and 10111211112104.

It is not an unprimeable number, because it can be changed into a prime (10111211112127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110369955 + ... + 110461528.

It is an arithmetic number, because the mean of its divisors is an integer number (749060393728).

Almost surely, 2^{10111211112121} is an apocalyptic number.

It is an amenable number.

10111211112121 is a deficient number, since it is larger than the sum of its proper divisors (1873755187527).

10111211112121 is a wasteful number, since it uses less digits than its factorization.

10111211112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220831732.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 10111211112121 its reverse (12121111211101), we get a palindrome (22232322323222).

The spelling of 10111211112121 in words is "ten trillion, one hundred eleven billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-one".