210100220022421 has 2 divisors, whose sum is σ = 210100220022422. Its totient is φ = 210100220022420.

The previous prime is 210100220022337. The next prime is 210100220022437. The reversal of 210100220022421 is 124220022001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196996102380900 + 13104117641521 = 14035530^2 + 3619961^2 .

It is a cyclic number.

It is not a de Polignac number, because 210100220022421 - 2¹⁹ = 210100219498133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210100220028421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050110011210 + 105050110011211.

It is an arithmetic number, because the mean of its divisors is an integer number (105050110011211).

Almost surely, 2^{210100220022421} is an apocalyptic number.

It is an amenable number.

210100220022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100220022421 is an equidigital number, since it uses as much as digits as its factorization.

210100220022421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 210100220022421 its reverse (124220022001012), we get a palindrome (334320242023433).

The spelling of 210100220022421 in words is "two hundred ten trillion, one hundred billion, two hundred twenty million, twenty-two thousand, four hundred twenty-one".