121321223132020 has 24 divisors (see below), whose sum is σ = 255041908143624. Its totient is φ = 48477567430656.

The previous prime is 121321223131961. The next prime is 121321223132023. The reversal of 121321223132020 is 20231322123121.

It can be written as a sum of positive squares in 4 ways, for example, as 3342914916496 + 117978308215524 = 1828364^2 + 10861782^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321223132023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3182594349 + ... + 3182632468.

It is an arithmetic number, because the mean of its divisors is an integer number (10626746172651).

Almost surely, 2^{121321223132020} is an apocalyptic number.

121321223132020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121321223132020 is an abundant number, since it is smaller than the sum of its proper divisors (133720685011604).

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

121321223132020 is a wasteful number, since it uses less digits than its factorization.

121321223132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365227779 (or 6365227777 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 121321223132020 its reverse (20231322123121), we get a palindrome (141552545255141).

The spelling of 121321223132020 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, twenty".