722121001 has 8 divisors (see below), whose sum is σ = 839269440. Its totient is φ = 608469648.

The previous prime is 722120981. The next prime is 722121031. The reversal of 722121001 is 100121227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722121001 - 2⁵ = 722120969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722121031) by changing a digit.

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, 873826 + ... + 874651.

It is an arithmetic number, because the mean of its divisors is an integer number (104908680).

Almost surely, 2^722121001 is an apocalyptic number.

It is an amenable number.

722121001 is a deficient number, since it is larger than the sum of its proper divisors (117148439).

722121001 is a wasteful number, since it uses less digits than its factorization.

722121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748543.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 722121001 is about 26872.3091862237. The cubic root of 722121001 is about 897.1601850285.

Adding to 722121001 its reverse (100121227), we get a palindrome (822242228).

The spelling of 722121001 in words is "seven hundred twenty-two million, one hundred twenty-one thousand, one".