12021131221031 has 8 divisors (see below), whose sum is σ = 12728288132784. Its totient is φ = 11313977814400.

The previous prime is 12021131221009. The next prime is 12021131221037. The reversal of 12021131221031 is 13012213112021.

12021131221031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021131221031 - 2¹⁴ = 12021131204647 is a prime.

It is a super-2 number, since 2×12021131221031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021131220994 and 12021131221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021131221037) 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, 10145981 + ... + 11268681.

It is an arithmetic number, because the mean of its divisors is an integer number (1591036016598).

Almost surely, 2^{12021131221031} is an apocalyptic number.

12021131221031 is a deficient number, since it is larger than the sum of its proper divisors (707156911753).

12021131221031 is a wasteful number, since it uses less digits than its factorization.

12021131221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752561.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12021131221031 its reverse (13012213112021), we get a palindrome (25033344333052).

The spelling of 12021131221031 in words is "twelve trillion, twenty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, thirty-one".