20213111329601 has 2 divisors, whose sum is σ = 20213111329602. Its totient is φ = 20213111329600.

The previous prime is 20213111329589. The next prime is 20213111329603. The reversal of 20213111329601 is 10692311131202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19734695640625 + 478415688976 = 4442375^2 + 691676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213111329601 is a prime.

Together with 20213111329603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20213111329603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106555664800 + 10106555664801.

It is an arithmetic number, because the mean of its divisors is an integer number (10106555664801).

Almost surely, 2^{20213111329601} is an apocalyptic number.

It is an amenable number.

20213111329601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213111329601 is an equidigital number, since it uses as much as digits as its factorization.

20213111329601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 20213111329601 in words is "twenty trillion, two hundred thirteen billion, one hundred eleven million, three hundred twenty-nine thousand, six hundred one".