2102021002 has 4 divisors (see below), whose sum is σ = 3153031506. Its totient is φ = 1051010500.

The previous prime is 2102020993. The next prime is 2102021027. The reversal of 2102021002 is 2001202012.

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., 1344615561 + 757405441 = 36669^2 + 27521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2102021002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525505249 + ... + 525505252.

Almost surely, 2^2102021002 is an apocalyptic number.

2102021002 is a deficient number, since it is larger than the sum of its proper divisors (1051010504).

2102021002 is a wasteful number, since it uses less digits than its factorization.

2102021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051010503.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2102021002 is about 45847.8025863836. The cubic root of 2102021002 is about 1280.9898353471.

Adding to 2102021002 its reverse (2001202012), we get a palindrome (4103223014).

The spelling of 2102021002 in words is "two billion, one hundred two million, twenty-one thousand, two".