402202031421 has 8 divisors (see below), whose sum is σ = 536275918240. Its totient is φ = 268131416112.

The previous prime is 402202031347. The next prime is 402202031453. The reversal of 402202031421 is 124130202204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402202031421 - 2⁷ = 402202031293 is a prime.

It is a super-4 number, since 4×402202031421⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402202031321) 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, 514990 + ... + 1034223.

It is an arithmetic number, because the mean of its divisors is an integer number (67034489780).

Almost surely, 2^402202031421 is an apocalyptic number.

It is an amenable number.

402202031421 is a deficient number, since it is larger than the sum of its proper divisors (134073886819).

402202031421 is a wasteful number, since it uses less digits than its factorization.

402202031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635755.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 402202031421 its reverse (124130202204), we get a palindrome (526332233625).

The spelling of 402202031421 in words is "four hundred two billion, two hundred two million, thirty-one thousand, four hundred twenty-one".