121310103020020 has 24 divisors (see below), whose sum is σ = 254751435565704. Its totient is φ = 48523999451136.

The previous prime is 121310103019969. The next prime is 121310103020033. The reversal of 121310103020020 is 20020301013121.

It can be written as a sum of positive squares in 4 ways, for example, as 24912816143076 + 96397286876944 = 4991274^2 + 9818212^2 .

It is a super-2 number, since 2×121310103020020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121310103019976 and 121310103020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33190104 + ... + 36663376.

It is an arithmetic number, because the mean of its divisors is an integer number (10614643148571).

Almost surely, 2^{121310103020020} is an apocalyptic number.

121310103020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310103020020 is an abundant number, since it is smaller than the sum of its proper divisors (133441332545684).

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

121310103020020 is a wasteful number, since it uses less digits than its factorization.

121310103020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219619 (or 5219617 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121310103020020 its reverse (20020301013121), we get a palindrome (141330404033141).

The spelling of 121310103020020 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred three million, twenty thousand, twenty".