1210020002 has 4 divisors (see below), whose sum is σ = 1815030006. Its totient is φ = 605010000.

The previous prime is 1210019989. The next prime is 1210020013. The reversal of 1210020002 is 2000200121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2000200121 = 35969 ⋅55609.

It can be written as a sum of positive squares in only one way, i.e., 654899281 + 555120721 = 25591^2 + 23561^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302504999 + ... + 302505002.

Almost surely, 2^1210020002 is an apocalyptic number.

1210020002 is a deficient number, since it is larger than the sum of its proper divisors (605010004).

1210020002 is an equidigital number, since it uses as much as digits as its factorization.

1210020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605010003.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1210020002 is about 34785.3417691993. The cubic root of 1210020002 is about 1065.6081084081.

Adding to 1210020002 its reverse (2000200121), we get a palindrome (3210220123).

The spelling of 1210020002 in words is "one billion, two hundred ten million, twenty thousand, two".