72120201510221 has 32 divisors (see below), whose sum is σ = 76970700499968. Its totient is φ = 67428672030720.

The previous prime is 72120201510211. The next prime is 72120201510293. The reversal of 72120201510221 is 12201510202127.

It is not a de Polignac number, because 72120201510221 - 2⁶ = 72120201510157 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 (72120201510211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2765014046 + ... + 2765040128.

It is an arithmetic number, because the mean of its divisors is an integer number (2405334390624).

Almost surely, 2^{72120201510221} is an apocalyptic number.

It is an amenable number.

72120201510221 is a deficient number, since it is larger than the sum of its proper divisors (4850498989747).

72120201510221 is a wasteful number, since it uses less digits than its factorization.

72120201510221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40001.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 72120201510221 its reverse (12201510202127), we get a palindrome (84321711712348).

The spelling of 72120201510221 in words is "seventy-two trillion, one hundred twenty billion, two hundred one million, five hundred ten thousand, two hundred twenty-one".