20000212222021 has 2 divisors, whose sum is σ = 20000212222022. Its totient is φ = 20000212222020.

The previous prime is 20000212221991. The next prime is 20000212222031. The reversal of 20000212222021 is 12022221200002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19948460976900 + 51751245121 = 4466370^2 + 227489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000212222021 - 2¹⁹ = 20000211697733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000212221986 and 20000212222004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000212222031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000106111010 + 10000106111011.

It is an arithmetic number, because the mean of its divisors is an integer number (10000106111011).

Almost surely, 2^{20000212222021} is an apocalyptic number.

It is an amenable number.

20000212222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000212222021 is an equidigital number, since it uses as much as digits as its factorization.

20000212222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20000212222021 its reverse (12022221200002), we get a palindrome (32022433422023).

The spelling of 20000212222021 in words is "twenty trillion, two hundred twelve million, two hundred twenty-two thousand, twenty-one".