11220121051 has 2 divisors, whose sum is σ = 11220121052. Its totient is φ = 11220121050.

The previous prime is 11220121001. The next prime is 11220121103. The reversal of 11220121051 is 15012102211.

It is a weak prime.

It is an emirp because it is prime and its reverse (15012102211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220121051 is a prime.

It is a super-2 number, since 2×11220121051² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11220121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610060525 + 5610060526.

It is an arithmetic number, because the mean of its divisors is an integer number (5610060526).

Almost surely, 2^11220121051 is an apocalyptic number.

11220121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220121051 is an equidigital number, since it uses as much as digits as its factorization.

11220121051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 11220121051 its reverse (15012102211), we get a palindrome (26232223262).

The spelling of 11220121051 in words is "eleven billion, two hundred twenty million, one hundred twenty-one thousand, fifty-one".