1020120221002 has 4 divisors (see below), whose sum is σ = 1530180331506. Its totient is φ = 510060110500.

The previous prime is 1020120220963. The next prime is 1020120221083. The reversal of 1020120221002 is 2001220210201.

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., 585376479801 + 434743741201 = 765099^2 + 659351^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255030055249 + ... + 255030055252.

Almost surely, 2^{1020120221002} is an apocalyptic number.

1020120221002 is a deficient number, since it is larger than the sum of its proper divisors (510060110504).

1020120221002 is an equidigital number, since it uses as much as digits as its factorization.

1020120221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510060110503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1020120221002 its reverse (2001220210201), we get a palindrome (3021340431203).

The spelling of 1020120221002 in words is "one trillion, twenty billion, one hundred twenty million, two hundred twenty-one thousand, two".