61221163000 has 32 divisors (see below), whose sum is σ = 143257523760. Its totient is φ = 24488464800.

The previous prime is 61221162953. The next prime is 61221163013. The reversal of 61221163000 is 36112216.

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 7 ways as a sum of consecutive naturals, for example, 30609582 + ... + 30611581.

Almost surely, 2^61221163000 is an apocalyptic number.

It is an amenable number.

61221163000 is an abundant number, since it is smaller than the sum of its proper divisors (82036360760).

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

61221163000 is a wasteful number, since it uses less digits than its factorization.

61221163000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61221184 (or 61221170 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 61221163000 its reverse (36112216), we get a palindrome (61257275216).

The spelling of 61221163000 in words is "sixty-one billion, two hundred twenty-one million, one hundred sixty-three thousand".