72420371270421 has 16 divisors (see below), whose sum is σ = 99218543483904. Its totient is φ = 46952494478784.

The previous prime is 72420371270389. The next prime is 72420371270453. The reversal of 72420371270421 is 12407217302427.

It is an interprime number because it is at equal distance from previous prime (72420371270389) and next prime (72420371270453).

It is not a de Polignac number, because 72420371270421 - 2⁵ = 72420371270389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420371270921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158670261 + ... + 159126026.

It is an arithmetic number, because the mean of its divisors is an integer number (6201158967744).

Almost surely, 2^{72420371270421} is an apocalyptic number.

It is an amenable number.

72420371270421 is a deficient number, since it is larger than the sum of its proper divisors (26798172213483).

72420371270421 is a wasteful number, since it uses less digits than its factorization.

72420371270421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317798380.

The product of its (nonzero) digits is 263424, while the sum is 42.

Adding to 72420371270421 its reverse (12407217302427), we get a palindrome (84827588572848).

The spelling of 72420371270421 in words is "seventy-two trillion, four hundred twenty billion, three hundred seventy-one million, two hundred seventy thousand, four hundred twenty-one".