121249171420 has 24 divisors (see below), whose sum is σ = 274209665184. Its totient is φ = 44768924736.

The previous prime is 121249171409. The next prime is 121249171469. The reversal of 121249171420 is 24171942121.

It is a congruent number.

It is an unprimeable number.

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, 233171224 + ... + 233171743.

It is an arithmetic number, because the mean of its divisors is an integer number (11425402716).

Almost surely, 2^121249171420 is an apocalyptic number.

121249171420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121249171420 is an abundant number, since it is smaller than the sum of its proper divisors (152960493764).

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

121249171420 is a wasteful number, since it uses less digits than its factorization.

121249171420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466342989 (or 466342987 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 121249171420 in words is "one hundred twenty-one billion, two hundred forty-nine million, one hundred seventy-one thousand, four hundred twenty".