151241021 has 4 divisors (see below), whose sum is σ = 153720444. Its totient is φ = 148761600.

The previous prime is 151241011. The next prime is 151241047. The reversal of 151241021 is 120142151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120142151 = 4391 ⋅27361.

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 138180025 = 3614^2 + 11755^2 .

It is a cyclic number.

It is not a de Polignac number, because 151241021 - 2¹⁰ = 151239997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151241011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239620 + ... + 1239741.

It is an arithmetic number, because the mean of its divisors is an integer number (38430111).

Almost surely, 2^151241021 is an apocalyptic number.

It is an amenable number.

151241021 is a deficient number, since it is larger than the sum of its proper divisors (2479423).

151241021 is an equidigital number, since it uses as much as digits as its factorization.

151241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479422.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 151241021 is about 12298.0088225696. The cubic root of 151241021 is about 532.7905748772.

Adding to 151241021 its reverse (120142151), we get a palindrome (271383172).

The spelling of 151241021 in words is "one hundred fifty-one million, two hundred forty-one thousand, twenty-one".