221129999999 has 16 divisors (see below), whose sum is σ = 226684085760. Its totient is φ = 215612105280.

The previous prime is 221129999971. The next prime is 221130000023. The reversal of 221129999999 is 999999921122.

It is a cyclic number.

It is not a de Polignac number, because 221129999999 - 2³² = 216835032703 is a prime.

It is a Duffinian number.

221129999999 is a modest number, since divided by 999999 gives 221129 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221129999939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37230572 + ... + 37236510.

It is an arithmetic number, because the mean of its divisors is an integer number (14167755360).

Almost surely, 2^221129999999 is an apocalyptic number.

221129999999 is a deficient number, since it is larger than the sum of its proper divisors (5554085761).

221129999999 is a wasteful number, since it uses less digits than its factorization.

221129999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830.

The product of its digits is 38263752, while the sum is 71.

The spelling of 221129999999 in words is "two hundred twenty-one billion, one hundred twenty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".