210021012202123 has 2 divisors, whose sum is σ = 210021012202124. Its totient is φ = 210021012202122.

The previous prime is 210021012202063. The next prime is 210021012202151. The reversal of 210021012202123 is 321202210120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210021012202123 - 2¹³ = 210021012193931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210021012202123.

It is not a weakly prime, because it can be changed into another prime (210021012202723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010506101061 + 105010506101062.

It is an arithmetic number, because the mean of its divisors is an integer number (105010506101062).

Almost surely, 2^{210021012202123} is an apocalyptic number.

210021012202123 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021012202123 is an equidigital number, since it uses as much as digits as its factorization.

210021012202123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210021012202123 its reverse (321202210120012), we get a palindrome (531223222322135).

The spelling of 210021012202123 in words is "two hundred ten trillion, twenty-one billion, twelve million, two hundred two thousand, one hundred twenty-three".