20011221210151 has 2 divisors, whose sum is σ = 20011221210152. Its totient is φ = 20011221210150.

The previous prime is 20011221210073. The next prime is 20011221210181. The reversal of 20011221210151 is 15101212211002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011221210151 - 2⁷ = 20011221210023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011221210181) 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, 10005610605075 + 10005610605076.

It is an arithmetic number, because the mean of its divisors is an integer number (10005610605076).

Almost surely, 2^{20011221210151} is an apocalyptic number.

20011221210151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011221210151 is an equidigital number, since it uses as much as digits as its factorization.

20011221210151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 20011221210151 its reverse (15101212211002), we get a palindrome (35112433421153).

The spelling of 20011221210151 in words is "twenty trillion, eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred fifty-one".