11251020220 has 48 divisors (see below), whose sum is σ = 25814865888. Its totient is φ = 4084962560.

The previous prime is 11251020211. The next prime is 11251020229. The reversal of 11251020220 is 2202015211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11251020211) and next prime (11251020229).

It is a junction number, because it is equal to n+sod(n) for n = 11251020194 and 11251020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11251020229) 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, 104502 + ... + 182818.

It is an arithmetic number, because the mean of its divisors is an integer number (537809706).

Almost surely, 2^11251020220 is an apocalyptic number.

11251020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11251020220 is an abundant number, since it is smaller than the sum of its proper divisors (14563845668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11251020220 is a wasteful number, since it uses less digits than its factorization.

11251020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78990 (or 78988 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 11251020220 its reverse (2202015211), we get a palindrome (13453035431).

The spelling of 11251020220 in words is "eleven billion, two hundred fifty-one million, twenty thousand, two hundred twenty".