202120219113949 has 2 divisors, whose sum is σ = 202120219113950. Its totient is φ = 202120219113948.

The previous prime is 202120219113947. The next prime is 202120219113959. The reversal of 202120219113949 is 949311912021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124232357445849 + 77887861668100 = 11145957^2 + 8825410^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120219113949 - 2¹ = 202120219113947 is a prime.

Together with 202120219113947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 202120219113899 and 202120219113908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202120219113941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060109556974 + 101060109556975.

It is an arithmetic number, because the mean of its divisors is an integer number (101060109556975).

Almost surely, 2^{202120219113949} is an apocalyptic number.

It is an amenable number.

202120219113949 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120219113949 is an equidigital number, since it uses as much as digits as its factorization.

202120219113949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 202120219113949 in words is "two hundred two trillion, one hundred twenty billion, two hundred nineteen million, one hundred thirteen thousand, nine hundred forty-nine".