4542121622421 has 12 divisors (see below), whose sum is σ = 6906149835520. Its totient is φ = 2868708393000.

The previous prime is 4542121622393. The next prime is 4542121622477. The reversal of 4542121622421 is 1242261212454.

4542121622421 is a `hidden beast` number, since 4 + 5 + 4 + 2 + 1 + 2 + 1 + 622 + 4 + 21 = 666.

It is not a de Polignac number, because 4542121622421 - 2¹¹ = 4542121620373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4542121622821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13281057205 + ... + 13281057546.

Almost surely, 2^{4542121622421} is an apocalyptic number.

It is an amenable number.

4542121622421 is a deficient number, since it is larger than the sum of its proper divisors (2364028213099).

4542121622421 is a wasteful number, since it uses less digits than its factorization.

4542121622421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26562114776 (or 26562114773 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

Adding to 4542121622421 its reverse (1242261212454), we get a palindrome (5784382834875).

The spelling of 4542121622421 in words is "four trillion, five hundred forty-two billion, one hundred twenty-one million, six hundred twenty-two thousand, four hundred twenty-one".