72121202 has 16 divisors (see below), whose sum is σ = 112152600. Its totient is φ = 34742400.

The previous prime is 72121201. The next prime is 72121223. The reversal of 72121202 is 20212127.

It can be written as a sum of positive squares in 4 ways, for example, as 62078641 + 10042561 = 7879^2 + 3169^2 .

It is not an unprimeable number, because it can be changed into a prime (72121201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33824 + ... + 35892.

Almost surely, 2^72121202 is an apocalyptic number.

72121202 is a deficient number, since it is larger than the sum of its proper divisors (40031398).

72121202 is a wasteful number, since it uses less digits than its factorization.

72121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 72121202 is about 8492.4202675091. The cubic root of 72121202 is about 416.2500692284.

Adding to 72121202 its reverse (20212127), we get a palindrome (92333329).

The spelling of 72121202 in words is "seventy-two million, one hundred twenty-one thousand, two hundred two".