20121100221122 has 8 divisors (see below), whose sum is σ = 30226496768076. Its totient is φ = 10045601298432.

The previous prime is 20121100221109. The next prime is 20121100221137. The reversal of 20121100221122 is 22112200112102.

It can be written as a sum of positive squares in 2 ways, for example, as 19844075899561 + 277024321561 = 4454669^2 + 526331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20121100221122.

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 3 ways as a sum of consecutive naturals, for example, 7474404383 + ... + 7474407074.

Almost surely, 2^{20121100221122} is an apocalyptic number.

20121100221122 is a deficient number, since it is larger than the sum of its proper divisors (10105396546954).

20121100221122 is a wasteful number, since it uses less digits than its factorization.

20121100221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14948812132.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20121100221122 its reverse (22112200112102), we get a palindrome (42233300333224).

The spelling of 20121100221122 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, one hundred twenty-two".