21146791150201 has 2 divisors, whose sum is σ = 21146791150202. Its totient is φ = 21146791150200.

The previous prime is 21146791150183. The next prime is 21146791150249. The reversal of 21146791150201 is 10205119764112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15037371618025 + 6109419532176 = 3877805^2 + 2471724^2 .

It is a cyclic number.

It is not a de Polignac number, because 21146791150201 - 2¹⁷ = 21146791019129 is a prime.

It is not a weakly prime, because it can be changed into another prime (21146791154201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10573395575100 + 10573395575101.

It is an arithmetic number, because the mean of its divisors is an integer number (10573395575101).

Almost surely, 2^{21146791150201} is an apocalyptic number.

It is an amenable number.

21146791150201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21146791150201 is an equidigital number, since it uses as much as digits as its factorization.

21146791150201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 21146791150201 in words is "twenty-one trillion, one hundred forty-six billion, seven hundred ninety-one million, one hundred fifty thousand, two hundred one".