20221151 has 2 divisors, whose sum is σ = 20221152. Its totient is φ = 20221150.

The previous prime is 20221147. The next prime is 20221153. The reversal of 20221151 is 15112202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20221151 - 2² = 20221147 is a prime.

Together with 20221153, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110575 + 10110576.

It is an arithmetic number, because the mean of its divisors is an integer number (10110576).

Almost surely, 2^20221151 is an apocalyptic number.

20221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221151 is an equidigital number, since it uses as much as digits as its factorization.

20221151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 20221151 is about 4496.7934130889. The cubic root of 20221151 is about 272.4385900953.

Adding to 20221151 its reverse (15112202), we get a palindrome (35333353).

The spelling of 20221151 in words is "twenty million, two hundred twenty-one thousand, one hundred fifty-one".