121020012220104 has 24 divisors (see below), whose sum is σ = 327762533096310. Its totient is φ = 40340004073344.

The previous prime is 121020012220103. The next prime is 121020012220127. The reversal of 121020012220104 is 401022210020121.

It can be written as a sum of positive squares in only one way, i.e., 120358233224100 + 661778996004 = 10970790^2 + 813498^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121020012220103) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 840416751457 + ... + 840416751600.

Almost surely, 2^{121020012220104} is an apocalyptic number.

It is an amenable number.

121020012220104 is an abundant number, since it is smaller than the sum of its proper divisors (206742520876206).

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

121020012220104 is a wasteful number, since it uses less digits than its factorization.

121020012220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680833503069 (or 1680833503062 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121020012220104 its reverse (401022210020121), we get a palindrome (522042222240225).

The spelling of 121020012220104 in words is "one hundred twenty-one trillion, twenty billion, twelve million, two hundred twenty thousand, one hundred four".