121351421532 has 24 divisors (see below), whose sum is σ = 308894527872. Its totient is φ = 36773158000.

The previous prime is 121351421531. The next prime is 121351421561. The reversal of 121351421532 is 235124153121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121351421532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121351421531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459664344 + ... + 459664607.

It is an arithmetic number, because the mean of its divisors is an integer number (12870605328).

Almost surely, 2^121351421532 is an apocalyptic number.

121351421532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121351421532 is an abundant number, since it is smaller than the sum of its proper divisors (187543106340).

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

121351421532 is a wasteful number, since it uses less digits than its factorization.

121351421532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919328969 (or 919328967 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 121351421532 its reverse (235124153121), we get a palindrome (356475574653).

The spelling of 121351421532 in words is "one hundred twenty-one billion, three hundred fifty-one million, four hundred twenty-one thousand, five hundred thirty-two".