7121804020 has 48 divisors (see below), whose sum is σ = 15125806080. Its totient is φ = 2816400384.

The previous prime is 7121803967. The next prime is 7121804023. The reversal of 7121804020 is 204081217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121804023) 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, 3411417 + ... + 3413503.

It is an arithmetic number, because the mean of its divisors is an integer number (315120960).

Almost surely, 2^7121804020 is an apocalyptic number.

It is an amenable number.

7121804020 is an abundant number, since it is smaller than the sum of its proper divisors (8004002060).

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

7121804020 is a wasteful number, since it uses less digits than its factorization.

7121804020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 7121804020 is about 84390.7816055759. The cubic root of 7121804020 is about 1923.9628095646.

Adding to 7121804020 its reverse (204081217), we get a palindrome (7325885237).

The spelling of 7121804020 in words is "seven billion, one hundred twenty-one million, eight hundred four thousand, twenty".