20120210341421 has 2 divisors, whose sum is σ = 20120210341422. Its totient is φ = 20120210341420.

The previous prime is 20120210341417. The next prime is 20120210341433. The reversal of 20120210341421 is 12414301202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19797115866025 + 323094475396 = 4449395^2 + 568414^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120210341421 - 2² = 20120210341417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120210347421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060105170710 + 10060105170711.

It is an arithmetic number, because the mean of its divisors is an integer number (10060105170711).

Almost surely, 2^{20120210341421} is an apocalyptic number.

It is an amenable number.

20120210341421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120210341421 is an equidigital number, since it uses as much as digits as its factorization.

20120210341421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 20120210341421 its reverse (12414301202102), we get a palindrome (32534511543523).

The spelling of 20120210341421 in words is "twenty trillion, one hundred twenty billion, two hundred ten million, three hundred forty-one thousand, four hundred twenty-one".