402132121 has 2 divisors, whose sum is σ = 402132122. Its totient is φ = 402132120.

The previous prime is 402132113. The next prime is 402132139. The reversal of 402132121 is 121231204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327067225 + 75064896 = 18085^2 + 8664^2 .

It is a cyclic number.

It is not a de Polignac number, because 402132121 - 2³ = 402132113 is a prime.

It is a super-3 number, since 3×402132121³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402132095 and 402132104.

It is not a weakly prime, because it can be changed into another prime (402132151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201066060 + 201066061.

It is an arithmetic number, because the mean of its divisors is an integer number (201066061).

Almost surely, 2^402132121 is an apocalyptic number.

It is an amenable number.

402132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

402132121 is an equidigital number, since it uses as much as digits as its factorization.

402132121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 402132121 is about 20053.2321833664. The cubic root of 402132121 is about 738.1131140530.

Adding to 402132121 its reverse (121231204), we get a palindrome (523363325).

The spelling of 402132121 in words is "four hundred two million, one hundred thirty-two thousand, one hundred twenty-one".