11211011012121 has 32 divisors (see below), whose sum is σ = 15448207564800. Its totient is φ = 7229122205760.

The previous prime is 11211011012107. The next prime is 11211011012143. The reversal of 11211011012121 is 12121011011211.

It is a de Polignac number, because none of the positive numbers 2^k-11211011012121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211011012121.

It is not an unprimeable number, because it can be changed into a prime (11211011012321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520020 + ... + 4763658.

It is an arithmetic number, because the mean of its divisors is an integer number (482756486400).

Almost surely, 2^{11211011012121} is an apocalyptic number.

It is an amenable number.

11211011012121 is a deficient number, since it is larger than the sum of its proper divisors (4237196552679).

11211011012121 is a wasteful number, since it uses less digits than its factorization.

11211011012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243949.

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

Adding to 11211011012121 its reverse (12121011011211), we get a palindrome (23332022023332).

The spelling of 11211011012121 in words is "eleven trillion, two hundred eleven billion, eleven million, twelve thousand, one hundred twenty-one".