121001020200120 has 64 divisors (see below), whose sum is σ = 365230073301120. Its totient is φ = 32068982035584.

The previous prime is 121001020200091. The next prime is 121001020200121. The reversal of 121001020200120 is 21002020100121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121001020200096 and 121001020200105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001020200121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3093053554 + ... + 3093092673.

It is an arithmetic number, because the mean of its divisors is an integer number (5706719895330).

Almost surely, 2^{121001020200120} is an apocalyptic number.

121001020200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001020200120 is an abundant number, since it is smaller than the sum of its proper divisors (244229053101000).

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

121001020200120 is a wasteful number, since it uses less digits than its factorization.

121001020200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186146404 (or 6186146400 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121001020200120 its reverse (21002020100121), we get a palindrome (142003040300241).

Subtracting from 121001020200120 its reverse (21002020100121), we obtain a palindrome (99999000099999).

The spelling of 121001020200120 in words is "one hundred twenty-one trillion, one billion, twenty million, two hundred thousand, one hundred twenty".