201034402421 has 4 divisors (see below), whose sum is σ = 201035387532. Its totient is φ = 201033417312.

The previous prime is 201034402397. The next prime is 201034402433. The reversal of 201034402421 is 124204430102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124204430102 = 2 ⋅62102215051.

It can be written as a sum of positive squares in 2 ways, for example, as 86648398321 + 114386004100 = 294361^2 + 338210^2 .

It is a cyclic number.

It is not a de Polignac number, because 201034402421 - 2²⁶ = 200967293557 is a prime.

It is a super-2 number, since 2×201034402421² (a number of 23 digits) contains 22 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 (201034402441) 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, 59576 + ... + 636881.

It is an arithmetic number, because the mean of its divisors is an integer number (50258846883).

Almost surely, 2^201034402421 is an apocalyptic number.

It is an amenable number.

201034402421 is a deficient number, since it is larger than the sum of its proper divisors (985111).

201034402421 is an equidigital number, since it uses as much as digits as its factorization.

201034402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985110.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 201034402421 its reverse (124204430102), we get a palindrome (325238832523).

The spelling of 201034402421 in words is "two hundred one billion, thirty-four million, four hundred two thousand, four hundred twenty-one".