121201112102020 has 24 divisors (see below), whose sum is σ = 254534112675864. Its totient is φ = 48478201552896.

The previous prime is 121201112101991. The next prime is 121201112102027. The reversal of 121201112102020 is 20201211102121.

It can be written as a sum of positive squares in 4 ways, for example, as 28774577269636 + 92426534832384 = 5364194^2 + 9613872^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121201112101985 and 121201112102003.

It is not an unprimeable number, because it can be changed into a prime (121201112102027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139762429 + ... + 140626948.

It is an arithmetic number, because the mean of its divisors is an integer number (10605588028161).

Almost surely, 2^{121201112102020} is an apocalyptic number.

121201112102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201112102020 is an abundant number, since it is smaller than the sum of its proper divisors (133333000573844).

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

121201112102020 is a wasteful number, since it uses less digits than its factorization.

121201112102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280410999 (or 280410997 counting only the distinct ones).

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

Adding to 121201112102020 its reverse (20201211102121), we get a palindrome (141402323204141).

The spelling of 121201112102020 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twelve million, one hundred two thousand, twenty".