201455125121 has 8 divisors (see below), whose sum is σ = 202970948544. Its totient is φ = 199943728560.

The previous prime is 201455125097. The next prime is 201455125139. The reversal of 201455125121 is 121521554102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201455125121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201455125321) 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, 1015331 + ... + 1197416.

It is an arithmetic number, because the mean of its divisors is an integer number (25371368568).

Almost surely, 2^201455125121 is an apocalyptic number.

It is an amenable number.

201455125121 is a deficient number, since it is larger than the sum of its proper divisors (1515823423).

201455125121 is a wasteful number, since it uses less digits than its factorization.

201455125121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213431.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 201455125121 its reverse (121521554102), we get a palindrome (322976679223).

The spelling of 201455125121 in words is "two hundred one billion, four hundred fifty-five million, one hundred twenty-five thousand, one hundred twenty-one".