20011202101949 has 2 divisors, whose sum is σ = 20011202101950. Its totient is φ = 20011202101948.

The previous prime is 20011202101901. The next prime is 20011202102033. The reversal of 20011202101949 is 94910120211002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11300233542724 + 8710968559225 = 3361582^2 + 2951435^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011202101949 - 2¹² = 20011202097853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011202101549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005601050974 + 10005601050975.

It is an arithmetic number, because the mean of its divisors is an integer number (10005601050975).

Almost surely, 2^{20011202101949} is an apocalyptic number.

It is an amenable number.

20011202101949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011202101949 is an equidigital number, since it uses as much as digits as its factorization.

20011202101949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 20011202101949 in words is "twenty trillion, eleven billion, two hundred two million, one hundred one thousand, nine hundred forty-nine".