121001102020 has 12 divisors (see below), whose sum is σ = 254102314284. Its totient is φ = 48400440800.

The previous prime is 121001101981. The next prime is 121001102077. The reversal of 121001102020 is 20201100121.

It can be written as a sum of positive squares in 2 ways, for example, as 70687920384 + 50313181636 = 265872^2 + 224306^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121001101988 and 121001102006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3025027531 + ... + 3025027570.

It is an arithmetic number, because the mean of its divisors is an integer number (21175192857).

Almost surely, 2^121001102020 is an apocalyptic number.

121001102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001102020 is an abundant number, since it is smaller than the sum of its proper divisors (133101212264).

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

121001102020 is a wasteful number, since it uses less digits than its factorization.

121001102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050055110 (or 6050055108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121001102020 its reverse (20201100121), we get a palindrome (141202202141).

The spelling of 121001102020 in words is "one hundred twenty-one billion, one million, one hundred two thousand, twenty".