152122021 has 8 divisors (see below), whose sum is σ = 153724824. Its totient is φ = 150528000.

The previous prime is 152121989. The next prime is 152122049. The reversal of 152122021 is 120221251.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12173121 + 139948900 = 3489^2 + 11830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 152122021 - 2⁵ = 152121989 is a prime.

It is a super-2 number, since 2×152122021² = 46282218546248882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 152121986 and 152122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152122051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36021 + ... + 40021.

It is an arithmetic number, because the mean of its divisors is an integer number (19215603).

Almost surely, 2^152122021 is an apocalyptic number.

It is an amenable number.

152122021 is a deficient number, since it is larger than the sum of its proper divisors (1602803).

152122021 is a wasteful number, since it uses less digits than its factorization.

152122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 152122021 is about 12333.7756181958. The cubic root of 152122021 is about 533.8230990202.

Adding to 152122021 its reverse (120221251), we get a palindrome (272343272).

The spelling of 152122021 in words is "one hundred fifty-two million, one hundred twenty-two thousand, twenty-one".