21020312002102 has 16 divisors (see below), whose sum is σ = 36090515831040. Its totient is φ = 8994781329768.

The previous prime is 21020312002097. The next prime is 21020312002127. The reversal of 21020312002102 is 20120021302012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160308452 + ... + 1160326567.

It is an arithmetic number, because the mean of its divisors is an integer number (2255657239440).

Almost surely, 2^{21020312002102} is an apocalyptic number.

21020312002102 is a deficient number, since it is larger than the sum of its proper divisors (15070203828938).

21020312002102 is a wasteful number, since it uses less digits than its factorization.

21020312002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320635675.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21020312002102 its reverse (20120021302012), we get a palindrome (41140333304114).

The spelling of 21020312002102 in words is "twenty-one trillion, twenty billion, three hundred twelve million, two thousand, one hundred two".