12021021031031 has 4 divisors (see below), whose sum is σ = 12022263266712. Its totient is φ = 12019778795352.

The previous prime is 12021021031003. The next prime is 12021021031091. The reversal of 12021021031031 is 13013012012021.

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 12021021031031 - 2³⁸ = 11746143124087 is a prime.

It is a super-2 number, since 2×12021021031031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021021031091) 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, 621103325 + ... + 621122678.

It is an arithmetic number, because the mean of its divisors is an integer number (3005565816678).

Almost surely, 2^{12021021031031} is an apocalyptic number.

12021021031031 is a deficient number, since it is larger than the sum of its proper divisors (1242235681).

12021021031031 is an equidigital number, since it uses as much as digits as its factorization.

12021021031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242235680.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12021021031031 its reverse (13013012012021), we get a palindrome (25034033043052).

The spelling of 12021021031031 in words is "twelve trillion, twenty-one billion, twenty-one million, thirty-one thousand, thirty-one".