11221420461 has 16 divisors (see below), whose sum is σ = 15003596160. Its totient is φ = 7460121600.

The previous prime is 11221420451. The next prime is 11221420487. The reversal of 11221420461 is 16402412211.

It is not a de Polignac number, because 11221420461 - 2²⁷ = 11087202733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221420451) 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, 2715645 + ... + 2719773.

It is an arithmetic number, because the mean of its divisors is an integer number (937724760).

Almost surely, 2^11221420461 is an apocalyptic number.

It is an amenable number.

11221420461 is a deficient number, since it is larger than the sum of its proper divisors (3782175699).

11221420461 is a wasteful number, since it uses less digits than its factorization.

11221420461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 11221420461 its reverse (16402412211), we get a palindrome (27623832672).

The spelling of 11221420461 in words is "eleven billion, two hundred twenty-one million, four hundred twenty thousand, four hundred sixty-one".