11101211220021 has 8 divisors (see below), whose sum is σ = 15940200726240. Its totient is φ = 6831514596912.

The previous prime is 11101211220017. The next prime is 11101211220119. The reversal of 11101211220021 is 12002211210111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11101211220021 - 2² = 11101211220017 is a prime.

It is a super-3 number, since 3×11101211220021³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101211220221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142323220731 + ... + 142323220808.

It is an arithmetic number, because the mean of its divisors is an integer number (1992525090780).

Almost surely, 2^{11101211220021} is an apocalyptic number.

It is an amenable number.

11101211220021 is a deficient number, since it is larger than the sum of its proper divisors (4838989506219).

11101211220021 is a wasteful number, since it uses less digits than its factorization.

11101211220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284646441555.

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

Adding to 11101211220021 its reverse (12002211210111), we get a palindrome (23103422430132).

The spelling of 11101211220021 in words is "eleven trillion, one hundred one billion, two hundred eleven million, two hundred twenty thousand, twenty-one".