722210121 has 32 divisors (see below), whose sum is σ = 1153756800. Its totient is φ = 444994560.

The previous prime is 722210119. The next prime is 722210123. The reversal of 722210121 is 121012227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (722210119) and next prime (722210123).

It is not a de Polignac number, because 722210121 - 2¹ = 722210119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722210094 and 722210103.

It is not an unprimeable number, because it can be changed into a prime (722210123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3865 + ... + 38201.

It is an arithmetic number, because the mean of its divisors is an integer number (36054900).

Almost surely, 2^722210121 is an apocalyptic number.

It is an amenable number.

722210121 is a deficient number, since it is larger than the sum of its proper divisors (431546679).

722210121 is a wasteful number, since it uses less digits than its factorization.

722210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34406 (or 34400 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 722210121 is about 26873.9673476024. The cubic root of 722210121 is about 897.1970909518.

Adding to 722210121 its reverse (121012227), we get a palindrome (843222348).

The spelling of 722210121 in words is "seven hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".