261202101 has 16 divisors (see below), whose sum is σ = 379243200. Its totient is φ = 159280128.

The previous prime is 261202091. The next prime is 261202133. The reversal of 261202101 is 101202162.

261202101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261202101 - 2⁵ = 261202069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261202141) 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, 77356 + ... + 80661.

It is an arithmetic number, because the mean of its divisors is an integer number (23702700).

Almost surely, 2^261202101 is an apocalyptic number.

It is an amenable number.

261202101 is a deficient number, since it is larger than the sum of its proper divisors (118041099).

261202101 is a wasteful number, since it uses less digits than its factorization.

261202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158068.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 261202101 is about 16161.7480799572. The cubic root of 261202101 is about 639.2325607446.

Adding to 261202101 its reverse (101202162), we get a palindrome (362404263).

The spelling of 261202101 in words is "two hundred sixty-one million, two hundred two thousand, one hundred one".