7212321415890 has 24 divisors (see below), whose sum is σ = 18752035681548. Its totient is φ = 1923285710880.

The previous prime is 7212321415879. The next prime is 7212321415913. The reversal of 7212321415890 is 985141232127.

7212321415890 is a `hidden beast` number, since 7 + 2 + 1 + 2 + 3 + 21 + 41 + 589 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7204119034401 + 8202381489 = 2684049^2 + 90567^2 .

It is a super-2 number, since 2×7212321415890² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 40068452221 + ... + 40068452400.

Almost surely, 2^{7212321415890} is an apocalyptic number.

7212321415890 is an abundant number, since it is smaller than the sum of its proper divisors (11539714265658).

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

7212321415890 is a wasteful number, since it uses less digits than its factorization.

7212321415890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80136904634 (or 80136904631 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 7212321415890 in words is "seven trillion, two hundred twelve billion, three hundred twenty-one million, four hundred fifteen thousand, eight hundred ninety".