12021021031 has 2 divisors, whose sum is σ = 12021021032. Its totient is φ = 12021021030.

The previous prime is 12021021007. The next prime is 12021021049. The reversal of 12021021031 is 13012012021.

It is a strong prime.

It is an emirp because it is prime and its reverse (13012012021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021021031 - 2⁹ = 12021020519 is a prime.

It is a super-2 number, since 2×12021021031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021021091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510515 + 6010510516.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510516).

Almost surely, 2^12021021031 is an apocalyptic number.

12021021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021021031 is an equidigital number, since it uses as much as digits as its factorization.

12021021031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12021021031 its reverse (13012012021), we get a palindrome (25033033052).

The spelling of 12021021031 in words is "twelve billion, twenty-one million, twenty-one thousand, thirty-one".