201020151 has 16 divisors (see below), whose sum is σ = 279272448. Its totient is φ = 128472000.

The previous prime is 201020147. The next prime is 201020153. The reversal of 201020151 is 151020102.

It is not a de Polignac number, because 201020151 - 2² = 201020147 is a prime.

It is a super-2 number, since 2×201020151² = 80818202216125602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020153) 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, 150 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (17454528).

Almost surely, 2^201020151 is an apocalyptic number.

201020151 is a deficient number, since it is larger than the sum of its proper divisors (78252297).

201020151 is a wasteful number, since it uses less digits than its factorization.

201020151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20342.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 201020151 is about 14178.1575319221. The cubic root of 201020151 is about 585.7961750409.

Adding to 201020151 its reverse (151020102), we get a palindrome (352040253).

The spelling of 201020151 in words is "two hundred one million, twenty thousand, one hundred fifty-one".