21202233020977 has 2 divisors, whose sum is σ = 21202233020978. Its totient is φ = 21202233020976.

The previous prime is 21202233020939. The next prime is 21202233021083. The reversal of 21202233020977 is 77902033220212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14698911895056 + 6503321125921 = 3833916^2 + 2550161^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202233020977 - 2¹⁹ = 21202232496689 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202233020777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601116510488 + 10601116510489.

It is an arithmetic number, because the mean of its divisors is an integer number (10601116510489).

Almost surely, 2^{21202233020977} is an apocalyptic number.

It is an amenable number.

21202233020977 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202233020977 is an equidigital number, since it uses as much as digits as its factorization.

21202233020977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 21202233020977 in words is "twenty-one trillion, two hundred two billion, two hundred thirty-three million, twenty thousand, nine hundred seventy-seven".