11220503661 has 24 divisors (see below), whose sum is σ = 17138284800. Its totient is φ = 7062465600.

The previous prime is 11220503641. The next prime is 11220503681. The reversal of 11220503661 is 16630502211.

It is an interprime number because it is at equal distance from previous prime (11220503641) and next prime (11220503681).

It is not a de Polignac number, because 11220503661 - 2⁶ = 11220503597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220503611) 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, 479011 + ... + 501888.

It is an arithmetic number, because the mean of its divisors is an integer number (714095200).

Almost surely, 2^11220503661 is an apocalyptic number.

It is an amenable number.

11220503661 is a deficient number, since it is larger than the sum of its proper divisors (5917781139).

11220503661 is a wasteful number, since it uses less digits than its factorization.

11220503661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980977 (or 980974 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 11220503661 in words is "eleven billion, two hundred twenty million, five hundred three thousand, six hundred sixty-one".