10101221010111 has 128 divisors (see below), whose sum is σ = 18200915066880. Its totient is φ = 4822791321600.

The previous prime is 10101221010091. The next prime is 10101221010137. The reversal of 10101221010111 is 11101012210101.

It is not a de Polignac number, because 10101221010111 - 2⁷ = 10101221009983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101221010151) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33145350 + ... + 33448716.

It is an arithmetic number, because the mean of its divisors is an integer number (142194648960).

Almost surely, 2^{10101221010111} is an apocalyptic number.

10101221010111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10101221010111 is a deficient number, since it is larger than the sum of its proper divisors (8099694056769).

10101221010111 is a wasteful number, since it uses less digits than its factorization.

10101221010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303605.

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

Adding to 10101221010111 its reverse (11101012210101), we get a palindrome (21202233220212).

It can be divided in two parts, 101012210101 and 11, that multiplied together give a palindrome (1111134311111).

The spelling of 10101221010111 in words is "ten trillion, one hundred one billion, two hundred twenty-one million, ten thousand, one hundred eleven".