72221222101 has 16 divisors (see below), whose sum is σ = 85409712000. Its totient is φ = 59751776448.

The previous prime is 72221222093. The next prime is 72221222131. The reversal of 72221222101 is 10122212227.

It is not a de Polignac number, because 72221222101 - 2³ = 72221222093 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 (72221222131) 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, 666850 + ... + 767548.

It is an arithmetic number, because the mean of its divisors is an integer number (5338107000).

Almost surely, 2^72221222101 is an apocalyptic number.

It is an amenable number.

72221222101 is a deficient number, since it is larger than the sum of its proper divisors (13188489899).

72221222101 is a wasteful number, since it uses less digits than its factorization.

72221222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104268.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 72221222101 its reverse (10122212227), we get a palindrome (82343434328).

The spelling of 72221222101 in words is "seventy-two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred one".