201023011 has 16 divisors (see below), whose sum is σ = 247852224. Its totient is φ = 159105024.

The previous prime is 201022993. The next prime is 201023029. The reversal of 201023011 is 110320102.

It is an interprime number because it is at equal distance from previous prime (201022993) and next prime (201023029).

It is a cyclic number.

It is not a de Polignac number, because 201023011 - 2⁷ = 201022883 is a prime.

It is a super-2 number, since 2×201023011² = 80820501903012242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201023071) 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, 9630 + ... + 22243.

It is an arithmetic number, because the mean of its divisors is an integer number (15490764).

Almost surely, 2^201023011 is an apocalyptic number.

201023011 is a deficient number, since it is larger than the sum of its proper divisors (46829213).

201023011 is a wasteful number, since it uses less digits than its factorization.

201023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31950.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 201023011 is about 14178.2583909308. The cubic root of 201023011 is about 585.7989531523.

Adding to 201023011 its reverse (110320102), we get a palindrome (311343113).

The spelling of 201023011 in words is "two hundred one million, twenty-three thousand, eleven".