12021031 has 4 divisors (see below), whose sum is σ = 13113864. Its totient is φ = 10928200.

The previous prime is 12021029. The next prime is 12021043. The reversal of 12021031 is 13012021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021031 - 2¹ = 12021029 is a prime.

It is a super-2 number, since 2×12021031² = 289010372605922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020999 and 12021017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546400 + ... + 546421.

It is an arithmetic number, because the mean of its divisors is an integer number (3278466).

Almost surely, 2^12021031 is an apocalyptic number.

12021031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12021031 is a deficient number, since it is larger than the sum of its proper divisors (1092833).

12021031 is a wasteful number, since it uses less digits than its factorization.

12021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092832.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12021031 is about 3467.1358496604. The cubic root of 12021031 is about 229.0765175925.

Adding to 12021031 its reverse (13012021), we get a palindrome (25033052).

The spelling of 12021031 in words is "twelve million, twenty-one thousand, thirty-one".