61110220101 has 64 divisors (see below), whose sum is σ = 98665536000. Its totient is φ = 33589721088.

The previous prime is 61110220099. The next prime is 61110220117. The reversal of 61110220101 is 10102201116.

It is a happy number.

It is not a de Polignac number, because 61110220101 - 2¹ = 61110220099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61110220141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8262261 + ... + 8269653.

It is an arithmetic number, because the mean of its divisors is an integer number (1541649000).

Almost surely, 2^61110220101 is an apocalyptic number.

It is an amenable number.

61110220101 is a deficient number, since it is larger than the sum of its proper divisors (37555315899).

61110220101 is a wasteful number, since it uses less digits than its factorization.

61110220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723 (or 7709 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 61110220101 its reverse (10102201116), we get a palindrome (71212421217).

The spelling of 61110220101 in words is "sixty-one billion, one hundred ten million, two hundred twenty thousand, one hundred one".