11101220102121 has 16 divisors (see below), whose sum is σ = 15202597216704. Its totient is φ = 7200352574784.

The previous prime is 11101220102081. The next prime is 11101220102131. The reversal of 11101220102121 is 12120102210111.

It is a happy number.

It is not a de Polignac number, because 11101220102121 - 2¹⁴ = 11101220085737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11101220102121.

It is not an unprimeable number, because it can be changed into a prime (11101220102131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213011 + ... + 4865576.

It is an arithmetic number, because the mean of its divisors is an integer number (950162326044).

Almost surely, 2^{11101220102121} is an apocalyptic number.

It is an amenable number.

11101220102121 is a deficient number, since it is larger than the sum of its proper divisors (4101377114583).

11101220102121 is a wasteful number, since it uses less digits than its factorization.

11101220102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095080.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11101220102121 its reverse (12120102210111), we get a palindrome (23221322312232).

The spelling of 11101220102121 in words is "eleven trillion, one hundred one billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".