11021220100121 has 24 divisors (see below), whose sum is σ = 14596566730176. Its totient is φ = 8082789361920.

The previous prime is 11021220100103. The next prime is 11021220100133. The reversal of 11021220100121 is 12100102212011.

It is a de Polignac number, because none of the positive numbers 2^k-11021220100121 is a prime.

It is a super-2 number, since 2×11021220100121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021220100096 and 11021220100105.

It is not an unprimeable number, because it can be changed into a prime (11021220100141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247612226 + ... + 247656731.

It is an arithmetic number, because the mean of its divisors is an integer number (608190280424).

Almost surely, 2^{11021220100121} is an apocalyptic number.

11021220100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021220100121 is a deficient number, since it is larger than the sum of its proper divisors (3575346630055).

11021220100121 is a wasteful number, since it uses less digits than its factorization.

11021220100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495269009 (or 495268992 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021220100121 its reverse (12100102212011), we get a palindrome (23121322312132).

The spelling of 11021220100121 in words is "eleven trillion, twenty-one billion, two hundred twenty million, one hundred thousand, one hundred twenty-one".