1002120122 has 4 divisors (see below), whose sum is σ = 1503180186. Its totient is φ = 501060060.

The previous prime is 1002120121. The next prime is 1002120127. The reversal of 1002120122 is 2210212001.

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., 612018121 + 390102001 = 24739^2 + 19751^2 .

It is not an unprimeable number, because it can be changed into a prime (1002120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250530029 + ... + 250530032.

Almost surely, 2^1002120122 is an apocalyptic number.

1002120122 is a deficient number, since it is larger than the sum of its proper divisors (501060064).

1002120122 is an equidigital number, since it uses as much as digits as its factorization.

1002120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501060063.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1002120122 is about 31656.2809249602. The cubic root of 1002120122 is about 1000.7062084855.

Adding to 1002120122 its reverse (2210212001), we get a palindrome (3212332123).

The spelling of 1002120122 in words is "one billion, two million, one hundred twenty thousand, one hundred twenty-two".