11101231212121 has 32 divisors (see below), whose sum is σ = 12161229470208. Its totient is φ = 10091600732160.

The previous prime is 11101231212067. The next prime is 11101231212133. The reversal of 11101231212121 is 12121213210111.

It is not a de Polignac number, because 11101231212121 - 2¹³ = 11101231203929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11101231212161) 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, 283052305 + ... + 283091521.

It is an arithmetic number, because the mean of its divisors is an integer number (380038420944).

Almost surely, 2^{11101231212121} is an apocalyptic number.

It is an amenable number.

11101231212121 is a deficient number, since it is larger than the sum of its proper divisors (1059998258087).

11101231212121 is a wasteful number, since it uses less digits than its factorization.

11101231212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43321.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11101231212121 its reverse (12121213210111), we get a palindrome (23222444422232).

The spelling of 11101231212121 in words is "eleven trillion, one hundred one billion, two hundred thirty-one million, two hundred twelve thousand, one hundred twenty-one".