121351531210 has 64 divisors (see below), whose sum is σ = 270046328832. Its totient is φ = 38233472256.

The previous prime is 121351531201. The next prime is 121351531237. The reversal of 121351531210 is 12135153121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96069 + ... + 501928.

It is an arithmetic number, because the mean of its divisors is an integer number (4219473888).

Almost surely, 2^121351531210 is an apocalyptic number.

121351531210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121351531210 is an abundant number, since it is smaller than the sum of its proper divisors (148694797622).

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

121351531210 is a wasteful number, since it uses less digits than its factorization.

121351531210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598247.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 121351531210 its reverse (12135153121), we get a palindrome (133486684331).

The spelling of 121351531210 in words is "one hundred twenty-one billion, three hundred fifty-one million, five hundred thirty-one thousand, two hundred ten".