20970101 has 2 divisors, whose sum is σ = 20970102. Its totient is φ = 20970100.

The previous prime is 20970077. The next prime is 20970121. The reversal of 20970101 is 10107902.

It is an a-pointer prime, because the next prime (20970121) can be obtained adding 20970101 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19589476 + 1380625 = 4426^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20970101 - 2¹⁴ = 20953717 is a prime.

It is a super-3 number, since 3×20970101³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20970121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10485050 + 10485051.

It is an arithmetic number, because the mean of its divisors is an integer number (10485051).

Almost surely, 2^20970101 is an apocalyptic number.

It is an amenable number.

20970101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20970101 is an equidigital number, since it uses as much as digits as its factorization.

20970101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20970101 is about 4579.3122846122. The cubic root of 20970101 is about 275.7614204108.

The spelling of 20970101 in words is "twenty million, nine hundred seventy thousand, one hundred one".