402121120202 has 4 divisors (see below), whose sum is σ = 603181680306. Its totient is φ = 201060560100.

The previous prime is 402121120183. The next prime is 402121120243. The reversal of 402121120202 is 202021121204.

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

It can be written as a sum of positive squares in only one way, i.e., 385192768321 + 16928351881 = 620639^2 + 130109^2 .

It is a super-2 number, since 2×402121120202² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100530280049 + ... + 100530280052.

Almost surely, 2^402121120202 is an apocalyptic number.

402121120202 is a deficient number, since it is larger than the sum of its proper divisors (201060560104).

402121120202 is a wasteful number, since it uses less digits than its factorization.

402121120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201060560103.

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

Adding to 402121120202 its reverse (202021121204), we get a palindrome (604142241406).

The spelling of 402121120202 in words is "four hundred two billion, one hundred twenty-one million, one hundred twenty thousand, two hundred two".