21021210002102 has 8 divisors (see below), whose sum is σ = 31602992916456. Its totient is φ = 10486879029952.

The previous prime is 21021210002047. The next prime is 21021210002119. The reversal of 21021210002102 is 20120001212012.

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

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, 11862984443 + ... + 11862986214.

It is an arithmetic number, because the mean of its divisors is an integer number (3950374114557).

Almost surely, 2^{21021210002102} is an apocalyptic number.

21021210002102 is a deficient number, since it is larger than the sum of its proper divisors (10581782914354).

21021210002102 is a wasteful number, since it uses less digits than its factorization.

21021210002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23725971102.

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

Adding to 21021210002102 its reverse (20120001212012), we get a palindrome (41141211214114).

The spelling of 21021210002102 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, two thousand, one hundred two".