61221102670 has 32 divisors (see below), whose sum is σ = 135628291008. Its totient is φ = 19375469568.

The previous prime is 61221102637. The next prime is 61221102713. The reversal of 61221102670 is 7620112216.

It is a super-2 number, since 2×61221102670² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33637059 + ... + 33638878.

It is an arithmetic number, because the mean of its divisors is an integer number (4238384094).

Almost surely, 2^61221102670 is an apocalyptic number.

61221102670 is an abundant number, since it is smaller than the sum of its proper divisors (74407188338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61221102670 is a wasteful number, since it uses less digits than its factorization.

61221102670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67275964.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 61221102670 its reverse (7620112216), we get a palindrome (68841214886).

The spelling of 61221102670 in words is "sixty-one billion, two hundred twenty-one million, one hundred two thousand, six hundred seventy".