61111101 has 4 divisors (see below), whose sum is σ = 81481472. Its totient is φ = 40740732.

The previous prime is 61111031. The next prime is 61111103. The reversal of 61111101 is 10111116.

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.

It is not a de Polignac number, because 61111101 - 2¹⁴ = 61094717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111103) 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, 10185181 + ... + 10185186.

It is an arithmetic number, because the mean of its divisors is an integer number (20370368).

Almost surely, 2^61111101 is an apocalyptic number.

It is an amenable number.

61111101 is a deficient number, since it is larger than the sum of its proper divisors (20370371).

61111101 is a wasteful number, since it uses less digits than its factorization.

61111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20370370.

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 61111101 is about 7817.3589529968. The cubic root of 61111101 is about 393.8885617656. Note that the first 3 decimals are identical.

Adding to 61111101 its reverse (10111116), we get a palindrome (71222217).

The spelling of 61111101 in words is "sixty-one million, one hundred eleven thousand, one hundred one".