21111201102 has 16 divisors (see below), whose sum is σ = 42234538752. Its totient is φ = 7035044280.

The previous prime is 21111201101. The next prime is 21111201149. The reversal of 21111201102 is 20110211112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111201101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 482998 + ... + 524889.

It is an arithmetic number, because the mean of its divisors is an integer number (2639658672).

Almost surely, 2^21111201102 is an apocalyptic number.

21111201102 is an abundant number, since it is smaller than the sum of its proper divisors (21123337650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111201102 is a wasteful number, since it uses less digits than its factorization.

21111201102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011383.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21111201102 its reverse (20110211112), we get a palindrome (41221412214).

The spelling of 21111201102 in words is "twenty-one billion, one hundred eleven million, two hundred one thousand, one hundred two".