12021000023120 has 80 divisors (see below), whose sum is σ = 30504748160448. Its totient is φ = 4369104875520.

The previous prime is 12021000023101. The next prime is 12021000023147. The reversal of 12021000023120 is 2132000012021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 12021000023095 and 12021000023104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611314 + ... + 5161233.

Almost surely, 2^{12021000023120} is an apocalyptic number.

12021000023120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021000023120 is an abundant number, since it is smaller than the sum of its proper divisors (18483748137328).

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

12021000023120 is a wasteful number, since it uses less digits than its factorization.

12021000023120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774588 (or 6774582 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12021000023120 its reverse (2132000012021), we get a palindrome (14153000035141).

The spelling of 12021000023120 in words is "twelve trillion, twenty-one billion, twenty-three thousand, one hundred twenty".