149421101 has 2 divisors, whose sum is σ = 149421102. Its totient is φ = 149421100.

The previous prime is 149421091. The next prime is 149421119. The reversal of 149421101 is 101124941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 63840100 = 9251^2 + 7990^2 .

It is an emirp because it is prime and its reverse (101124941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149421101 - 2¹⁸ = 149158957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149421191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74710550 + 74710551.

It is an arithmetic number, because the mean of its divisors is an integer number (74710551).

Almost surely, 2^149421101 is an apocalyptic number.

It is an amenable number.

149421101 is a deficient number, since it is larger than the sum of its proper divisors (1).

149421101 is an equidigital number, since it uses as much as digits as its factorization.

149421101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 149421101 is about 12223.7924147950. The cubic root of 149421101 is about 530.6448789608.

The spelling of 149421101 in words is "one hundred forty-nine million, four hundred twenty-one thousand, one hundred one".