7421713701621 has 32 divisors (see below), whose sum is σ = 10512275800320. Its totient is φ = 4641413796864.

The previous prime is 7421713701607. The next prime is 7421713701659. The reversal of 7421713701621 is 1261073171247.

It is not a de Polignac number, because 7421713701621 - 2⁹ = 7421713701109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421713701601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36020931 + ... + 36226383.

It is an arithmetic number, because the mean of its divisors is an integer number (328508618760).

Almost surely, 2^{7421713701621} is an apocalyptic number.

It is an amenable number.

7421713701621 is a deficient number, since it is larger than the sum of its proper divisors (3090562098699).

7421713701621 is a wasteful number, since it uses less digits than its factorization.

7421713701621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207805.

The product of its (nonzero) digits is 98784, while the sum is 42.

Adding to 7421713701621 its reverse (1261073171247), we get a palindrome (8682786872868).

The spelling of 7421713701621 in words is "seven trillion, four hundred twenty-one billion, seven hundred thirteen million, seven hundred one thousand, six hundred twenty-one".