21101221001102 has 32 divisors (see below), whose sum is σ = 35136098490240. Its totient is φ = 9423100694880.

The previous prime is 21101221001101. The next prime is 21101221001123. The reversal of 21101221001102 is 20110012210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101221001101) 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 15 ways as a sum of consecutive naturals, for example, 2884073 + ... + 7107764.

It is an arithmetic number, because the mean of its divisors is an integer number (1098003077820).

Almost surely, 2^{21101221001102} is an apocalyptic number.

21101221001102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101221001102 is a deficient number, since it is larger than the sum of its proper divisors (14034877489138).

21101221001102 is a wasteful number, since it uses less digits than its factorization.

21101221001102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993536.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101221001102 its reverse (20110012210112), we get a palindrome (41211233211214).

The spelling of 21101221001102 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-one million, one thousand, one hundred two".