21202012102102 has 64 divisors (see below), whose sum is σ = 35089803262080. Its totient is φ = 9548348544000.

The previous prime is 21202012102087. The next prime is 21202012102121. The reversal of 21202012102102 is 20120121020212.

It is a happy number.

It is a super-4 number, since 4×21202012102102⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490890724 + ... + 490933912.

It is an arithmetic number, because the mean of its divisors is an integer number (548278175970).

Almost surely, 2^{21202012102102} is an apocalyptic number.

21202012102102 is a deficient number, since it is larger than the sum of its proper divisors (13887791159978).

21202012102102 is a wasteful number, since it uses less digits than its factorization.

21202012102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46009.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202012102102 its reverse (20120121020212), we get a palindrome (41322133122314).

The spelling of 21202012102102 in words is "twenty-one trillion, two hundred two billion, twelve million, one hundred two thousand, one hundred two".