100201616261 has 4 divisors (see below), whose sum is σ = 101899948800. Its totient is φ = 98503283724.

The previous prime is 100201616227. The next prime is 100201616269. The reversal of 100201616261 is 162616102001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162616102001 = 153719 ⋅1057879.

It is a cyclic number.

It is not a de Polignac number, because 100201616261 - 2⁶ = 100201616197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100201616261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100201616269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849166181 + ... + 849166298.

It is an arithmetic number, because the mean of its divisors is an integer number (25474987200).

Almost surely, 2^100201616261 is an apocalyptic number.

It is an amenable number.

100201616261 is a deficient number, since it is larger than the sum of its proper divisors (1698332539).

100201616261 is an equidigital number, since it uses as much as digits as its factorization.

100201616261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698332538.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 100201616261 its reverse (162616102001), we get a palindrome (262817718262).

The spelling of 100201616261 in words is "one hundred billion, two hundred one million, six hundred sixteen thousand, two hundred sixty-one".