202121002202051 has 2 divisors, whose sum is σ = 202121002202052. Its totient is φ = 202121002202050.

The previous prime is 202121002201927. The next prime is 202121002202071. The reversal of 202121002202051 is 150202200121202.

It is an a-pointer prime, because the next prime (202121002202071) can be obtained adding 202121002202051 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202121002202051 - 2⁴² = 197722955690947 is a prime.

It is not a weakly prime, because it can be changed into another prime (202121002202071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060501101025 + 101060501101026.

It is an arithmetic number, because the mean of its divisors is an integer number (101060501101026).

Almost surely, 2^{202121002202051} is an apocalyptic number.

202121002202051 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121002202051 is an equidigital number, since it uses as much as digits as its factorization.

202121002202051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 202121002202051 its reverse (150202200121202), we get a palindrome (352323202323253).

The spelling of 202121002202051 in words is "two hundred two trillion, one hundred twenty-one billion, two million, two hundred two thousand, fifty-one".