2402122221 has 6 divisors (see below), whose sum is σ = 3469732110. Its totient is φ = 1601414808.

The previous prime is 2402122181. The next prime is 2402122223. The reversal of 2402122221 is 1222212042.

It can be written as a sum of positive squares in only one way, i.e., 2402078121 + 44100 = 49011^2 + 210^2 .

It is not a de Polignac number, because 2402122221 - 2⁶ = 2402122157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2402122194 and 2402122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2402122223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133451226 + ... + 133451243.

It is an arithmetic number, because the mean of its divisors is an integer number (578288685).

Almost surely, 2^2402122221 is an apocalyptic number.

It is an amenable number.

2402122221 is a deficient number, since it is larger than the sum of its proper divisors (1067609889).

2402122221 is a wasteful number, since it uses less digits than its factorization.

2402122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266902475 (or 266902472 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2402122221 is about 49011.4498969373. The cubic root of 2402122221 is about 1339.2604185308.

Adding to 2402122221 its reverse (1222212042), we get a palindrome (3624334263).

The spelling of 2402122221 in words is "two billion, four hundred two million, one hundred twenty-two thousand, two hundred twenty-one".