722121002 has 16 divisors (see below), whose sum is σ = 1147857480. Its totient is φ = 339537408.

The previous prime is 722120981. The next prime is 722121031. The reversal of 722121002 is 200121227.

It can be written as a sum of positive squares in 4 ways, for example, as 703363441 + 18757561 = 26521^2 + 4331^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35588 + ... + 52064.

Almost surely, 2^722121002 is an apocalyptic number.

722121002 is a deficient number, since it is larger than the sum of its proper divisors (425736478).

722121002 is a wasteful number, since it uses less digits than its factorization.

722121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17785.

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

The square root of 722121002 is about 26872.3092048302. The cubic root of 722121002 is about 897.1601854427.

Adding to 722121002 its reverse (200121227), we get a palindrome (922242229).

The spelling of 722121002 in words is "seven hundred twenty-two million, one hundred twenty-one thousand, two".