152101021 has 4 divisors (see below), whose sum is σ = 155810844. Its totient is φ = 148391200.

The previous prime is 152101009. The next prime is 152101031. The reversal of 152101021 is 120101251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15912121 + 136188900 = 3989^2 + 11670^2 .

It is a cyclic number.

It is not a de Polignac number, because 152101021 - 2¹⁷ = 151969949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 152100992 and 152101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152101031) 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 3 ways as a sum of consecutive naturals, for example, 1854850 + ... + 1854931.

It is an arithmetic number, because the mean of its divisors is an integer number (38952711).

Almost surely, 2^152101021 is an apocalyptic number.

It is an amenable number.

152101021 is a deficient number, since it is larger than the sum of its proper divisors (3709823).

152101021 is an equidigital number, since it uses as much as digits as its factorization.

152101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709822.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 152101021 is about 12332.9242679909. The cubic root of 152101021 is about 533.7985336507.

Adding to 152101021 its reverse (120101251), we get a palindrome (272202272).

The spelling of 152101021 in words is "one hundred fifty-two million, one hundred one thousand, twenty-one".