20001021002102 has 8 divisors (see below), whose sum is σ = 34287464575056. Its totient is φ = 8571866143752.

The previous prime is 20001021002071. The next prime is 20001021002191. The reversal of 20001021002102 is 20120012010002.

It is a happy number.

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

It is a super-2 number, since 2×20001021002102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 714322178633 + ... + 714322178660.

It is an arithmetic number, because the mean of its divisors is an integer number (4285933071882).

Almost surely, 2^{20001021002102} is an apocalyptic number.

20001021002102 is a deficient number, since it is larger than the sum of its proper divisors (14286443572954).

20001021002102 is a wasteful number, since it uses less digits than its factorization.

20001021002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428644357302.

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

Adding to 20001021002102 its reverse (20120012010002), we get a palindrome (40121033012104).

The spelling of 20001021002102 in words is "twenty trillion, one billion, twenty-one million, two thousand, one hundred two".