21002110202102 has 8 divisors (see below), whose sum is σ = 31503473706312. Its totient is φ = 10500952300000.

The previous prime is 21002110202057. The next prime is 21002110202107. The reversal of 21002110202102 is 20120201120012.

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

It is a super-2 number, since 2×21002110202102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002110202107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51144899 + ... + 51553902.

It is an arithmetic number, because the mean of its divisors is an integer number (3937934213289).

Almost surely, 2^{21002110202102} is an apocalyptic number.

21002110202102 is a deficient number, since it is larger than the sum of its proper divisors (10501363504210).

21002110202102 is a wasteful number, since it uses less digits than its factorization.

21002110202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102801054.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002110202102 its reverse (20120201120012), we get a palindrome (41122311322114).

The spelling of 21002110202102 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred two thousand, one hundred two".