20121344120 has 16 divisors (see below), whose sum is σ = 45273024360. Its totient is φ = 8048537632.

The previous prime is 20121344101. The next prime is 20121344171. The reversal of 20121344120 is 2144312102.

It is a super-3 number, since 3×20121344120³ (a number of 32 digits) contains 333 as substring.

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 = 20121344092 and 20121344101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251516762 + ... + 251516841.

Almost surely, 2^20121344120 is an apocalyptic number.

20121344120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121344120 is an abundant number, since it is smaller than the sum of its proper divisors (25151680240).

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

20121344120 is a wasteful number, since it uses less digits than its factorization.

20121344120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503033614 (or 503033610 counting only the distinct ones).

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

Adding to 20121344120 its reverse (2144312102), we get a palindrome (22265656222).

The spelling of 20121344120 in words is "twenty billion, one hundred twenty-one million, three hundred forty-four thousand, one hundred twenty".