21002022012031 has 2 divisors, whose sum is σ = 21002022012032. Its totient is φ = 21002022012030.

The previous prime is 21002022012011. The next prime is 21002022012043. The reversal of 21002022012031 is 13021022020012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002022012031 - 2⁷ = 21002022011903 is a prime.

It is a super-2 number, since 2×21002022012031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002022011996 and 21002022012014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002022012011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501011006015 + 10501011006016.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011006016).

Almost surely, 2^{21002022012031} is an apocalyptic number.

21002022012031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002022012031 is an equidigital number, since it uses as much as digits as its factorization.

21002022012031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21002022012031 its reverse (13021022020012), we get a palindrome (34023044032043).

The spelling of 21002022012031 in words is "twenty-one trillion, two billion, twenty-two million, twelve thousand, thirty-one".