201425402350221 has 16 divisors (see below), whose sum is σ = 310098213930624. Its totient is φ = 113913629604864.

The previous prime is 201425402350217. The next prime is 201425402350241. The reversal of 201425402350221 is 122053204524102.

It is not a de Polignac number, because 201425402350221 - 2² = 201425402350217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201425402350241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49441677480 + ... + 49441681553.

It is an arithmetic number, because the mean of its divisors is an integer number (19381138370664).

Almost surely, 2^{201425402350221} is an apocalyptic number.

201425402350221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201425402350221 is a deficient number, since it is larger than the sum of its proper divisors (108672811580403).

201425402350221 is an equidigital number, since it uses as much as digits as its factorization.

201425402350221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98883359140.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 201425402350221 its reverse (122053204524102), we get a palindrome (323478606874323).

The spelling of 201425402350221 in words is "two hundred one trillion, four hundred twenty-five billion, four hundred two million, three hundred fifty thousand, two hundred twenty-one".