21211021102 has 8 divisors (see below), whose sum is σ = 32219272800. Its totient is φ = 10471263504.

The previous prime is 21211021081. The next prime is 21211021121. The reversal of 21211021102 is 20112011212.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67123327 + ... + 67123642.

It is an arithmetic number, because the mean of its divisors is an integer number (4027409100).

Almost surely, 2^21211021102 is an apocalyptic number.

21211021102 is a deficient number, since it is larger than the sum of its proper divisors (11008251698).

21211021102 is a wasteful number, since it uses less digits than its factorization.

21211021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134247050.

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

Adding to 21211021102 its reverse (20112011212), we get a palindrome (41323032314).

The spelling of 21211021102 in words is "twenty-one billion, two hundred eleven million, twenty-one thousand, one hundred two".