121121230231020 has 48 divisors (see below), whose sum is σ = 341809833996288. Its totient is φ = 32044671933120.

The previous prime is 121121230231019. The next prime is 121121230231039. The reversal of 121121230231020 is 20132032121121.

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, 7947579666 + ... + 7947594905.

It is an arithmetic number, because the mean of its divisors is an integer number (7121038208256).

Almost surely, 2^{121121230231020} is an apocalyptic number.

121121230231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121230231020 is an abundant number, since it is smaller than the sum of its proper divisors (220688603765268).

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

121121230231020 is a wasteful number, since it uses less digits than its factorization.

121121230231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895174710 (or 15895174708 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121121230231020 its reverse (20132032121121), we get a palindrome (141253262352141).

The spelling of 121121230231020 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred thirty million, two hundred thirty-one thousand, twenty".