11211220121012 has 24 divisors (see below), whose sum is σ = 19864126017120. Its totient is φ = 5536090579680.

The previous prime is 11211220120987. The next prime is 11211220121071. The reversal of 11211220121012 is 21012102211211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41745314 + ... + 42013017.

It is an arithmetic number, because the mean of its divisors is an integer number (827671917380).

Almost surely, 2^{11211220121012} is an apocalyptic number.

It is an amenable number.

11211220121012 is a deficient number, since it is larger than the sum of its proper divisors (8652905896108).

11211220121012 is a wasteful number, since it uses less digits than its factorization.

11211220121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83758751 (or 83758749 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211220121012 its reverse (21012102211211), we get a palindrome (32223322332223).

The spelling of 11211220121012 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, twelve".