11101211010021 has 32 divisors (see below), whose sum is σ = 16296046208640. Its totient is φ = 6665999328000.

The previous prime is 11101211009929. The next prime is 11101211010023. The reversal of 11101211010021 is 12001011210111.

It is not a de Polignac number, because 11101211010021 - 2⁹ = 11101211009509 is a prime.

It is a super-2 number, since 2×11101211010021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11101211009979 and 11101211010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101211010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111072171 + ... + 111172071.

It is an arithmetic number, because the mean of its divisors is an integer number (509251444020).

Almost surely, 2^{11101211010021} is an apocalyptic number.

11101211010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101211010021 is a deficient number, since it is larger than the sum of its proper divisors (5194835198619).

11101211010021 is a wasteful number, since it uses less digits than its factorization.

11101211010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130917.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11101211010021 its reverse (12001011210111), we get a palindrome (23102222220132).

The spelling of 11101211010021 in words is "eleven trillion, one hundred one billion, two hundred eleven million, ten thousand, twenty-one".