72101210 has 32 divisors (see below), whose sum is σ = 132596352. Its totient is φ = 28221760.

The previous prime is 72101209. The next prime is 72101261. The reversal of 72101210 is 1210127.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122537 + ... + 123123.

It is an arithmetic number, because the mean of its divisors is an integer number (4143636).

Almost surely, 2^72101210 is an apocalyptic number.

72101210 is a deficient number, since it is larger than the sum of its proper divisors (60495142).

72101210 is a wasteful number, since it uses less digits than its factorization.

72101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 72101210 is about 8491.2431363140. The cubic root of 72101210 is about 416.2116041622.

Adding to 72101210 its reverse (1210127), we get a palindrome (73311337).

The spelling of 72101210 in words is "seventy-two million, one hundred one thousand, two hundred ten".