121500000000010 has 32 divisors (see below), whose sum is σ = 239034535114752. Its totient is φ = 44265654647040.

The previous prime is 121499999999999. The next prime is 121500000000073. The reversal of 121500000000010 is 10000000005121.

It is a happy number.

121500000000010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 11527508962 + ... + 11527519501.

It is an arithmetic number, because the mean of its divisors is an integer number (7469829222336).

Almost surely, 2^{121500000000010} is an apocalyptic number.

121500000000010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121500000000010 is a deficient number, since it is larger than the sum of its proper divisors (117534535114742).

121500000000010 is a wasteful number, since it uses less digits than its factorization.

121500000000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23055028518.

The product of its (nonzero) digits is 10, while the sum is 10.

Adding to 121500000000010 its reverse (10000000005121), we get a palindrome (131500000005131).

The spelling of 121500000000010 in words is "one hundred twenty-one trillion, five hundred billion, ten", and thus it is an aban number.