2102121002 has 4 divisors (see below), whose sum is σ = 3153181506. Its totient is φ = 1051060500.

The previous prime is 2102120989. The next prime is 2102121011. The reversal of 2102121002 is 2001212012.

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., 1167657241 + 934463761 = 34171^2 + 30569^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525530249 + ... + 525530252.

Almost surely, 2^2102121002 is an apocalyptic number.

2102121002 is a deficient number, since it is larger than the sum of its proper divisors (1051060504).

2102121002 is a wasteful number, since it uses less digits than its factorization.

2102121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051060503.

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

The square root of 2102121002 is about 45848.8931382209. The cubic root of 2102121002 is about 1281.0101486475.

Adding to 2102121002 its reverse (2001212012), we get a palindrome (4103333014).

It can be divided in two parts, 210 and 2121002, that added together give a palindrome (2121212).

The spelling of 2102121002 in words is "two billion, one hundred two million, one hundred twenty-one thousand, two".