121530400002 has 64 divisors (see below), whose sum is σ = 294744528000. Its totient is φ = 36811722240.

The previous prime is 121530399997. The next prime is 121530400049. The reversal of 121530400002 is 200004035121.

It is a super-2 number, since 2×121530400002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1393374 + ... + 1478022.

It is an arithmetic number, because the mean of its divisors is an integer number (4605383250).

Almost surely, 2^121530400002 is an apocalyptic number.

121530400002 is an abundant number, since it is smaller than the sum of its proper divisors (173214127998).

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

121530400002 is a wasteful number, since it uses less digits than its factorization.

121530400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87088 (or 87082 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 121530400002 its reverse (200004035121), we get a palindrome (321534435123).

The spelling of 121530400002 in words is "one hundred twenty-one billion, five hundred thirty million, four hundred thousand, two".