61101821 has 8 divisors (see below), whose sum is σ = 66765600. Its totient is φ = 55456240.

The previous prime is 61101797. The next prime is 61101841. The reversal of 61101821 is 12810116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61101821 - 2¹⁸ = 60839677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61101793 and 61101802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61101841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3035 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (8345700).

Almost surely, 2^61101821 is an apocalyptic number.

It is an amenable number.

61101821 is a deficient number, since it is larger than the sum of its proper divisors (5663779).

61101821 is a wasteful number, since it uses less digits than its factorization.

61101821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9099.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 61101821 is about 7816.7653796183. The cubic root of 61101821 is about 393.8686228302.

Adding to 61101821 its reverse (12810116), we get a palindrome (73911937).

The spelling of 61101821 in words is "sixty-one million, one hundred one thousand, eight hundred twenty-one".