87220000120 has 32 divisors (see below), whose sum is σ = 214085455920. Its totient is φ = 31716363520.

The previous prime is 87220000111. The next prime is 87220000139. The reversal of 87220000120 is 2100002278.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 87220000091 and 87220000100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99113197 + ... + 99114076.

Almost surely, 2^87220000120 is an apocalyptic number.

It is an amenable number.

87220000120 is an abundant number, since it is smaller than the sum of its proper divisors (126865455800).

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

87220000120 is a wasteful number, since it uses less digits than its factorization.

87220000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198227295 (or 198227291 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 87220000120 its reverse (2100002278), we get a palindrome (89320002398).

The spelling of 87220000120 in words is "eighty-seven billion, two hundred twenty million, one hundred twenty", and thus it is an aban number.