212021210121023 has 2 divisors, whose sum is σ = 212021210121024. Its totient is φ = 212021210121022.

The previous prime is 212021210121011. The next prime is 212021210121131. The reversal of 212021210121023 is 320121012120212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021210121023 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021210120986 and 212021210121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021210129023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010605060511 + 106010605060512.

It is an arithmetic number, because the mean of its divisors is an integer number (106010605060512).

Almost surely, 2^{212021210121023} is an apocalyptic number.

212021210121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021210121023 is an equidigital number, since it uses as much as digits as its factorization.

212021210121023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212021210121023 its reverse (320121012120212), we get a palindrome (532142222241235).

The spelling of 212021210121023 in words is "two hundred twelve trillion, twenty-one billion, two hundred ten million, one hundred twenty-one thousand, twenty-three".