221012010111 has 32 divisors (see below), whose sum is σ = 306941184000. Its totient is φ = 141301180800.

The previous prime is 221012010101. The next prime is 221012010119. The reversal of 221012010111 is 111010210122.

It is not a de Polignac number, because 221012010111 - 2¹³ = 221012001919 is a prime.

It is a super-2 number, since 2×221012010111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012010119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8917765 + ... + 8942513.

It is an arithmetic number, because the mean of its divisors is an integer number (9591912000).

Almost surely, 2^221012010111 is an apocalyptic number.

221012010111 is a deficient number, since it is larger than the sum of its proper divisors (85929173889).

221012010111 is a wasteful number, since it uses less digits than its factorization.

221012010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25647.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221012010111 its reverse (111010210122), we get a palindrome (332022220233).

The spelling of 221012010111 in words is "two hundred twenty-one billion, twelve million, ten thousand, one hundred eleven".