21211100102 has 32 divisors (see below), whose sum is σ = 32427924480. Its totient is φ = 10403789760.

The previous prime is 21211100093. The next prime is 21211100111. The reversal of 21211100102 is 20100111212.

It is an interprime number because it is at equal distance from previous prime (21211100093) and next prime (21211100111).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28547543 + ... + 28548285.

It is an arithmetic number, because the mean of its divisors is an integer number (1013372640).

Almost surely, 2^21211100102 is an apocalyptic number.

21211100102 is a deficient number, since it is larger than the sum of its proper divisors (11216824378).

21211100102 is a wasteful number, since it uses less digits than its factorization.

21211100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

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

Adding to 21211100102 its reverse (20100111212), we get a palindrome (41311211314).

The spelling of 21211100102 in words is "twenty-one billion, two hundred eleven million, one hundred thousand, one hundred two".