121121322231020 has 96 divisors (see below), whose sum is σ = 255816660492288. Its totient is φ = 48170663165952.

The previous prime is 121121322231011. The next prime is 121121322231023. The reversal of 121121322231020 is 20132223121121.

It is not an unprimeable number, because it can be changed into a prime (121121322231023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15260336492 + ... + 15260344428.

It is an arithmetic number, because the mean of its divisors is an integer number (2664756880128).

Almost surely, 2^{121121322231020} is an apocalyptic number.

121121322231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121322231020 is an abundant number, since it is smaller than the sum of its proper divisors (134695338261268).

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

121121322231020 is a wasteful number, since it uses less digits than its factorization.

121121322231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12039 (or 12037 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 121121322231020 its reverse (20132223121121), we get a palindrome (141253545352141).

The spelling of 121121322231020 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, twenty".