61100022021 has 4 divisors (see below), whose sum is σ = 81466696032. Its totient is φ = 40733348012.

The previous prime is 61100022007. The next prime is 61100022029. The reversal of 61100022021 is 12022000116.

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 a cyclic number.

It is not a de Polignac number, because 61100022021 - 2¹³ = 61100013829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61100022029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10183337001 + ... + 10183337006.

It is an arithmetic number, because the mean of its divisors is an integer number (20366674008).

Almost surely, 2^61100022021 is an apocalyptic number.

It is an amenable number.

61100022021 is a deficient number, since it is larger than the sum of its proper divisors (20366674011).

61100022021 is a wasteful number, since it uses less digits than its factorization.

61100022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20366674010.

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

Adding to 61100022021 its reverse (12022000116), we get a palindrome (73122022137).

The spelling of 61100022021 in words is "sixty-one billion, one hundred million, twenty-two thousand, twenty-one".