121032144020 has 24 divisors (see below), whose sum is σ = 254338261800. Its totient is φ = 48380332032.

The previous prime is 121032144007. The next prime is 121032144043. The reversal of 121032144020 is 20441230121.

It can be written as a sum of positive squares in 4 ways, for example, as 11379768976 + 109652375044 = 106676^2 + 331138^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121032143983 and 121032144001.

It is a congruent 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, 2002325 + ... + 2061884.

It is an arithmetic number, because the mean of its divisors is an integer number (10597427575).

Almost surely, 2^121032144020 is an apocalyptic number.

121032144020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121032144020 is an abundant number, since it is smaller than the sum of its proper divisors (133306117780).

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

121032144020 is a wasteful number, since it uses less digits than its factorization.

121032144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065707 (or 4065705 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121032144020 its reverse (20441230121), we get a palindrome (141473374141).

The spelling of 121032144020 in words is "one hundred twenty-one billion, thirty-two million, one hundred forty-four thousand, twenty".