20213321123153 has 2 divisors, whose sum is σ = 20213321123154. Its totient is φ = 20213321123152.

The previous prime is 20213321122991. The next prime is 20213321123161. The reversal of 20213321123153 is 35132112331202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20118301827649 + 95019295504 = 4485343^2 + 308252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213321123153 is a prime.

It is a super-2 number, since 2×20213321123153² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20213321123173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106660561576 + 10106660561577.

It is an arithmetic number, because the mean of its divisors is an integer number (10106660561577).

Almost surely, 2^{20213321123153} is an apocalyptic number.

It is an amenable number.

20213321123153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213321123153 is an equidigital number, since it uses as much as digits as its factorization.

20213321123153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 20213321123153 its reverse (35132112331202), we get a palindrome (55345433454355).

The spelling of 20213321123153 in words is "twenty trillion, two hundred thirteen billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred fifty-three".