402121240001 has 8 divisors (see below), whose sum is σ = 438985885800. Its totient is φ = 366104057472.

The previous prime is 402121239997. The next prime is 402121240019. The reversal of 402121240001 is 100042121204.

It can be written as a sum of positive squares in 4 ways, for example, as 437813776 + 401683426225 = 20924^2 + 633785^2 .

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 402121240001 - 2² = 402121239997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402121240061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211864826 + ... + 211866723.

It is an arithmetic number, because the mean of its divisors is an integer number (54873235725).

Almost surely, 2^402121240001 is an apocalyptic number.

It is an amenable number.

402121240001 is a deficient number, since it is larger than the sum of its proper divisors (36864645799).

402121240001 is a wasteful number, since it uses less digits than its factorization.

402121240001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423731635.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 402121240001 its reverse (100042121204), we get a palindrome (502163361205).

The spelling of 402121240001 in words is "four hundred two billion, one hundred twenty-one million, two hundred forty thousand, one".