11111012102121 has 64 divisors (see below), whose sum is σ = 15682686566400. Its totient is φ = 6986835161600.

The previous prime is 11111012102087. The next prime is 11111012102137. The reversal of 11111012102121 is 12120121011111.

It is not a de Polignac number, because 11111012102121 - 2³¹ = 11108864618473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111012102121.

It is not an unprimeable number, because it can be changed into a prime (11111012102221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1075496926 + ... + 1075507256.

It is an arithmetic number, because the mean of its divisors is an integer number (245041977600).

Almost surely, 2^{11111012102121} is an apocalyptic number.

It is an amenable number.

11111012102121 is a deficient number, since it is larger than the sum of its proper divisors (4571674464279).

11111012102121 is a wasteful number, since it uses less digits than its factorization.

11111012102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11710.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11111012102121 its reverse (12120121011111), we get a palindrome (23231133113232).

The spelling of 11111012102121 in words is "eleven trillion, one hundred eleven billion, twelve million, one hundred two thousand, one hundred twenty-one".