202121945951 has 2 divisors, whose sum is σ = 202121945952. Its totient is φ = 202121945950.

The previous prime is 202121945947. The next prime is 202121945957. The reversal of 202121945951 is 159549121202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202121945951 - 2² = 202121945947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202121945899 and 202121945908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202121945957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060972975 + 101060972976.

It is an arithmetic number, because the mean of its divisors is an integer number (101060972976).

Almost surely, 2^202121945951 is an apocalyptic number.

202121945951 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121945951 is an equidigital number, since it uses as much as digits as its factorization.

202121945951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 202121945951 in words is "two hundred two billion, one hundred twenty-one million, nine hundred forty-five thousand, nine hundred fifty-one".