10120220400 has 60 divisors (see below), whose sum is σ = 32418443192. Its totient is φ = 2698725120.

The previous prime is 10120220389. The next prime is 10120220417. The reversal of 10120220400 is 402202101.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4215559 + ... + 4217958.

Almost surely, 2^10120220400 is an apocalyptic number.

10120220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10120220400 is an abundant number, since it is smaller than the sum of its proper divisors (22298222792).

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

10120220400 is a wasteful number, since it uses less digits than its factorization.

10120220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433538 (or 8433527 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 10120220400 its reverse (402202101), we get a palindrome (10522422501).

The spelling of 10120220400 in words is "ten billion, one hundred twenty million, two hundred twenty thousand, four hundred".