121310030020 has 48 divisors (see below), whose sum is σ = 268017665328. Its totient is φ = 46061015040.

The previous prime is 121310030011. The next prime is 121310030081. The reversal of 121310030020 is 20030013121.

It can be written as a sum of positive squares in 8 ways, for example, as 14778292356 + 106531737664 = 121566^2 + 326392^2 .

It is a super-2 number, since 2×121310030020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968837 + ... + 2029516.

It is an arithmetic number, because the mean of its divisors is an integer number (5583701361).

Almost surely, 2^121310030020 is an apocalyptic number.

121310030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310030020 is an abundant number, since it is smaller than the sum of its proper divisors (146707635308).

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

121310030020 is a wasteful number, since it uses less digits than its factorization.

121310030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998440 (or 3998438 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 121310030020 its reverse (20030013121), we get a palindrome (141340043141).

The spelling of 121310030020 in words is "one hundred twenty-one billion, three hundred ten million, thirty thousand, twenty".