121502552020 has 12 divisors (see below), whose sum is σ = 255155359284. Its totient is φ = 48601020800.

The previous prime is 121502551987. The next prime is 121502552071. The reversal of 121502552020 is 20255205121.

It can be written as a sum of positive squares in 2 ways, for example, as 95785298064 + 25717253956 = 309492^2 + 160366^2 .

It is a congruent number.

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, 3037563781 + ... + 3037563820.

It is an arithmetic number, because the mean of its divisors is an integer number (21262946607).

Almost surely, 2^121502552020 is an apocalyptic number.

121502552020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121502552020 is an abundant number, since it is smaller than the sum of its proper divisors (133652807264).

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

121502552020 is a wasteful number, since it uses less digits than its factorization.

121502552020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075127610 (or 6075127608 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 121502552020 its reverse (20255205121), we get a palindrome (141757757141).

The spelling of 121502552020 in words is "one hundred twenty-one billion, five hundred two million, five hundred fifty-two thousand, twenty".