1213220122 has 4 divisors (see below), whose sum is σ = 1819830186. Its totient is φ = 606610060.

The previous prime is 1213220089. The next prime is 1213220131. The reversal of 1213220122 is 2210223121.

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., 844541721 + 368678401 = 29061^2 + 19201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213220096 and 1213220105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303305029 + ... + 303305032.

Almost surely, 2^1213220122 is an apocalyptic number.

1213220122 is a deficient number, since it is larger than the sum of its proper divisors (606610064).

1213220122 is an equidigital number, since it uses as much as digits as its factorization.

1213220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606610063.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1213220122 is about 34831.3095073958. The cubic root of 1213220122 is about 1066.5466802319.

Adding to 1213220122 its reverse (2210223121), we get a palindrome (3423443243).

Subtracting 1213220122 from its reverse (2210223121), we obtain a cube (997002999 = 999³).

The spelling of 1213220122 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, one hundred twenty-two".