402253512121001 has 4 divisors (see below), whose sum is σ = 403331939767812. Its totient is φ = 401175084474192.

The previous prime is 402253512120973. The next prime is 402253512121037. The reversal of 402253512121001 is 100121215352204.

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 142103064648601 + 260150447472400 = 11920699^2 + 16129180^2 .

It is a cyclic number.

It is not a de Polignac number, because 402253512121001 - 2⁴² = 397855465609897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402253512121051) 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, 539213822846 + ... + 539213823591.

It is an arithmetic number, because the mean of its divisors is an integer number (100832984941953).

Almost surely, 2^{402253512121001} is an apocalyptic number.

It is an amenable number.

402253512121001 is a deficient number, since it is larger than the sum of its proper divisors (1078427646811).

402253512121001 is a wasteful number, since it uses less digits than its factorization.

402253512121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078427646810.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 402253512121001 its reverse (100121215352204), we get a palindrome (502374727473205).

The spelling of 402253512121001 in words is "four hundred two trillion, two hundred fifty-three billion, five hundred twelve million, one hundred twenty-one thousand, one".