21211010102 has 8 divisors (see below), whose sum is σ = 32098077576. Its totient is φ = 10511650912.

The previous prime is 21211010099. The next prime is 21211010129. The reversal of 21211010102 is 20101011212.

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, 46926788 + ... + 46927239.

It is an arithmetic number, because the mean of its divisors is an integer number (4012259697).

Almost surely, 2^21211010102 is an apocalyptic number.

21211010102 is a deficient number, since it is larger than the sum of its proper divisors (10887067474).

21211010102 is a wasteful number, since it uses less digits than its factorization.

21211010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93854142.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21211010102 its reverse (20101011212), we get a palindrome (41312021314).

The spelling of 21211010102 in words is "twenty-one billion, two hundred eleven million, ten thousand, one hundred two".