121031332020 has 144 divisors (see below), whose sum is σ = 379388161152. Its totient is φ = 31212115200.

The previous prime is 121031331947. The next prime is 121031332043. The reversal of 121031332020 is 20233130121.

121031332020 is a `hidden beast` number, since 1 + 2 + 10 + 313 + 320 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121031331984 and 121031332002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704329 + ... + 859151.

It is an arithmetic number, because the mean of its divisors is an integer number (2634640008).

Almost surely, 2^121031332020 is an apocalyptic number.

121031332020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121031332020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189694080576).

121031332020 is an abundant number, since it is smaller than the sum of its proper divisors (258356829132).

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

121031332020 is a wasteful number, since it uses less digits than its factorization.

121031332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154982 (or 154977 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121031332020 its reverse (20233130121), we get a palindrome (141264462141).

The spelling of 121031332020 in words is "one hundred twenty-one billion, thirty-one million, three hundred thirty-two thousand, twenty".