7221247746020 has 144 divisors (see below), whose sum is σ = 19247823661248. Its totient is φ = 2250349597440.

The previous prime is 7221247746001. The next prime is 7221247746059. The reversal of 7221247746020 is 206477421227.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59045654 + ... + 59167826.

It is an arithmetic number, because the mean of its divisors is an integer number (133665442092).

Almost surely, 2^{7221247746020} is an apocalyptic number.

7221247746020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221247746020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9623911830624).

7221247746020 is an abundant number, since it is smaller than the sum of its proper divisors (12026575915228).

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

7221247746020 is a wasteful number, since it uses less digits than its factorization.

7221247746020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127690 (or 127681 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 44.

The spelling of 7221247746020 in words is "seven trillion, two hundred twenty-one billion, two hundred forty-seven million, seven hundred forty-six thousand, twenty".