101221111011 has 16 divisors (see below), whose sum is σ = 138948048800. Its totient is φ = 65496377088.

The previous prime is 101221111007. The next prime is 101221111049. The reversal of 101221111011 is 110111122101.

It is not a de Polignac number, because 101221111011 - 2² = 101221111007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221111111) 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, 1069396 + ... + 1160193.

It is an arithmetic number, because the mean of its divisors is an integer number (8684253050).

Almost surely, 2^101221111011 is an apocalyptic number.

101221111011 is a deficient number, since it is larger than the sum of its proper divisors (37726937789).

101221111011 is a wasteful number, since it uses less digits than its factorization.

101221111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230038.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 101221111011 its reverse (110111122101), we get a palindrome (211332233112).

The spelling of 101221111011 in words is "one hundred one billion, two hundred twenty-one million, one hundred eleven thousand, eleven".