121148447820 has 24 divisors (see below), whose sum is σ = 339215654064. Its totient is φ = 32306252736.

The previous prime is 121148447731. The next prime is 121148447891. The reversal of 121148447820 is 28744841121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009570339 + ... + 1009570458.

It is an arithmetic number, because the mean of its divisors is an integer number (14133985586).

Almost surely, 2^121148447820 is an apocalyptic number.

121148447820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121148447820 is an abundant number, since it is smaller than the sum of its proper divisors (218067206244).

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

121148447820 is a wasteful number, since it uses less digits than its factorization.

121148447820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019140809 (or 2019140807 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The spelling of 121148447820 in words is "one hundred twenty-one billion, one hundred forty-eight million, four hundred forty-seven thousand, eight hundred twenty".