202120010381 has 2 divisors, whose sum is σ = 202120010382. Its totient is φ = 202120010380.

The previous prime is 202120010363. The next prime is 202120010401. The reversal of 202120010381 is 183010021202.

It is an a-pointer prime, because the next prime (202120010401) can be obtained adding 202120010381 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125631258025 + 76488752356 = 354445^2 + 276566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202120010381 is a prime.

It is a super-2 number, since 2×202120010381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202120060381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060005190 + 101060005191.

It is an arithmetic number, because the mean of its divisors is an integer number (101060005191).

Almost surely, 2^202120010381 is an apocalyptic number.

It is an amenable number.

202120010381 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120010381 is an equidigital number, since it uses as much as digits as its factorization.

202120010381 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 20.

Adding to 202120010381 its reverse (183010021202), we get a palindrome (385130031583).

The spelling of 202120010381 in words is "two hundred two billion, one hundred twenty million, ten thousand, three hundred eighty-one".