21221010010102 has 8 divisors (see below), whose sum is σ = 36378874303056. Its totient is φ = 9094718575752.

The previous prime is 21221010010073. The next prime is 21221010010139. The reversal of 21221010010102 is 20101001012212.

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

It is a super-2 number, since 2×21221010010102² (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, 757893214633 + ... + 757893214660.

It is an arithmetic number, because the mean of its divisors is an integer number (4547359287882).

Almost surely, 2^{21221010010102} is an apocalyptic number.

21221010010102 is a deficient number, since it is larger than the sum of its proper divisors (15157864292954).

21221010010102 is a wasteful number, since it uses less digits than its factorization.

21221010010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515786429302.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21221010010102 its reverse (20101001012212), we get a palindrome (41322011022314).

The spelling of 21221010010102 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, ten thousand, one hundred two".