7121123400 has 96 divisors (see below), whose sum is σ = 22180500000. Its totient is φ = 1889932800.

The previous prime is 7121123381. The next prime is 7121123419. The reversal of 7121123400 is 43211217.

It is an interprime number because it is at equal distance from previous prime (7121123381) and next prime (7121123419).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98476 + ... + 154724.

It is an arithmetic number, because the mean of its divisors is an integer number (231046875).

Almost surely, 2^7121123400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7121123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11090250000).

7121123400 is an abundant number, since it is smaller than the sum of its proper divisors (15059376600).

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

7121123400 is a wasteful number, since it uses less digits than its factorization.

7121123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56479 (or 56470 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 7121123400 is about 84386.7489597745. The cubic root of 7121123400 is about 1923.9015175436.

Adding to 7121123400 its reverse (43211217), we get a palindrome (7164334617).

The spelling of 7121123400 in words is "seven billion, one hundred twenty-one million, one hundred twenty-three thousand, four hundred".