121012200021020 has 144 divisors (see below), whose sum is σ = 320446006239744. Its totient is φ = 37574672150400.

The previous prime is 121012200020909. The next prime is 121012200021047. The reversal of 121012200021020 is 20120002210121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121012200020986 and 121012200021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9125726 + ... + 18036165.

It is an arithmetic number, because the mean of its divisors is an integer number (2225319487776).

Almost surely, 2^{121012200021020} is an apocalyptic number.

121012200021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012200021020 is an abundant number, since it is smaller than the sum of its proper divisors (199433806218724).

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

121012200021020 is a wasteful number, since it uses less digits than its factorization.

121012200021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27162192 (or 27162179 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121012200021020 its reverse (20120002210121), we get a palindrome (141132202231141).

The spelling of 121012200021020 in words is "one hundred twenty-one trillion, twelve billion, two hundred million, twenty-one thousand, twenty".