201501456121 has 32 divisors (see below), whose sum is σ = 234214041600. Its totient is φ = 169793608320.

The previous prime is 201501456119. The next prime is 201501456157. The reversal of 201501456121 is 121654105102.

It is not a de Polignac number, because 201501456121 - 2¹ = 201501456119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201501456121.

It is not an unprimeable number, because it can be changed into a prime (201501456521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125233165 + ... + 125234773.

It is an arithmetic number, because the mean of its divisors is an integer number (7319188800).

Almost surely, 2^201501456121 is an apocalyptic number.

It is an amenable number.

201501456121 is a deficient number, since it is larger than the sum of its proper divisors (32712585479).

201501456121 is a wasteful number, since it uses less digits than its factorization.

201501456121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 201501456121 in words is "two hundred one billion, five hundred one million, four hundred fifty-six thousand, one hundred twenty-one".