21112121100202 has 16 divisors (see below), whose sum is σ = 34547195705472. Its totient is φ = 9596394112320.

The previous prime is 21112121100163. The next prime is 21112121100241. The reversal of 21112121100202 is 20200112121112.

It is an interprime number because it is at equal distance from previous prime (21112121100163) and next prime (21112121100241).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9733138 + ... + 11702914.

It is an arithmetic number, because the mean of its divisors is an integer number (2159199731592).

Almost surely, 2^{21112121100202} is an apocalyptic number.

21112121100202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112121100202 is a deficient number, since it is larger than the sum of its proper divisors (13435074605270).

21112121100202 is a wasteful number, since it uses less digits than its factorization.

21112121100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456973.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112121100202 its reverse (20200112121112), we get a palindrome (41312233221314).

The spelling of 21112121100202 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred thousand, two hundred two".