121201300020 has 48 divisors (see below), whose sum is σ = 354118584960. Its totient is φ = 30915113856.

The previous prime is 121201300019. The next prime is 121201300021. The reversal of 121201300020 is 20003102121.

It is an interprime number because it is at equal distance from previous prime (121201300019) and next prime (121201300021).

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 = 121201299969 and 121201300005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201300021) 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, 43912135 + ... + 43914894.

It is an arithmetic number, because the mean of its divisors is an integer number (7377470520).

Almost surely, 2^121201300020 is an apocalyptic number.

121201300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201300020 is an abundant number, since it is smaller than the sum of its proper divisors (232917284940).

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

121201300020 is a wasteful number, since it uses less digits than its factorization.

121201300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87827064 (or 87827062 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121201300020 its reverse (20003102121), we get a palindrome (141204402141).

The spelling of 121201300020 in words is "one hundred twenty-one billion, two hundred one million, three hundred thousand, twenty".