521222331122 has 4 divisors (see below), whose sum is σ = 781833496686. Its totient is φ = 260611165560.

The previous prime is 521222331121. The next prime is 521222331139. The reversal of 521222331122 is 221133222125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 265326979801 + 255895351321 = 515099^2 + 505861^2 .

It is a junction number, because it is equal to n+sod(n) for n = 521222331091 and 521222331100.

It is not an unprimeable number, because it can be changed into a prime (521222331121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130305582779 + ... + 130305582782.

Almost surely, 2^521222331122 is an apocalyptic number.

521222331122 is a deficient number, since it is larger than the sum of its proper divisors (260611165564).

521222331122 is a wasteful number, since it uses less digits than its factorization.

521222331122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260611165563.

The product of its digits is 2880, while the sum is 26.

Adding to 521222331122 its reverse (221133222125), we get a palindrome (742355553247).

The spelling of 521222331122 in words is "five hundred twenty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, one hundred twenty-two".