20212144039961 has 2 divisors, whose sum is σ = 20212144039962. Its totient is φ = 20212144039960.

The previous prime is 20212144039943. The next prime is 20212144040083. The reversal of 20212144039961 is 16993044121202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10305897678400 + 9906246361561 = 3210280^2 + 3147419^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212144039961 - 2¹⁰ = 20212144038937 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212144009961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106072019980 + 10106072019981.

It is an arithmetic number, because the mean of its divisors is an integer number (10106072019981).

Almost surely, 2^{20212144039961} is an apocalyptic number.

It is an amenable number.

20212144039961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212144039961 is an equidigital number, since it uses as much as digits as its factorization.

20212144039961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 20212144039961 in words is "twenty trillion, two hundred twelve billion, one hundred forty-four million, thirty-nine thousand, nine hundred sixty-one".