20100020021002 has 8 divisors (see below), whose sum is σ = 30151204495236. Its totient is φ = 10049618522592.

The previous prime is 20100020020999. The next prime is 20100020021017. The reversal of 20100020021002 is 20012002000102.

It can be written as a sum of positive squares in 2 ways, for example, as 16904259567441 + 3195760453561 = 4111479^2 + 1787669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20100020021002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195679773 + ... + 195782464.

Almost surely, 2^{20100020021002} is an apocalyptic number.

20100020021002 is a deficient number, since it is larger than the sum of its proper divisors (10051184474234).

20100020021002 is a wasteful number, since it uses less digits than its factorization.

20100020021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391487912.

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

Adding to 20100020021002 its reverse (20012002000102), we get a palindrome (40112022021104).

The spelling of 20100020021002 in words is "twenty trillion, one hundred billion, twenty million, twenty-one thousand, two".