221012100011111 has 8 divisors (see below), whose sum is σ = 222752876881920. Its totient is φ = 219271331329848.

The previous prime is 221012100011047. The next prime is 221012100011113. The reversal of 221012100011111 is 111110001210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221012100011111 - 2⁶ = 221012100011047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012100011113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59365220 + ... + 62978198.

It is an arithmetic number, because the mean of its divisors is an integer number (27844109610240).

Almost surely, 2^{221012100011111} is an apocalyptic number.

221012100011111 is a deficient number, since it is larger than the sum of its proper divisors (1740776870809).

221012100011111 is a wasteful number, since it uses less digits than its factorization.

221012100011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094773.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221012100011111 its reverse (111110001210122), we get a palindrome (332122101221233).

The spelling of 221012100011111 in words is "two hundred twenty-one trillion, twelve billion, one hundred million, eleven thousand, one hundred eleven".