10011212111121 has 32 divisors (see below), whose sum is σ = 14549445036672. Its totient is φ = 6086027404800.

The previous prime is 10011212111113. The next prime is 10011212111149. The reversal of 10011212111121 is 12111121211001.

It is not a de Polignac number, because 10011212111121 - 2³ = 10011212111113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10011212111121.

It is not an unprimeable number, because it can be changed into a prime (10011212111161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42069171 + ... + 42306471.

It is an arithmetic number, because the mean of its divisors is an integer number (454670157396).

Almost surely, 2^{10011212111121} is an apocalyptic number.

It is an amenable number.

10011212111121 is a deficient number, since it is larger than the sum of its proper divisors (4538232925551).

10011212111121 is a wasteful number, since it uses less digits than its factorization.

10011212111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250433.

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

Adding to 10011212111121 its reverse (12111121211001), we get a palindrome (22122333322122).

The spelling of 10011212111121 in words is "ten trillion, eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-one".