10120221111 has 48 divisors (see below), whose sum is σ = 18254630912. Its totient is φ = 4852837440.

The previous prime is 10120221071. The next prime is 10120221113. The reversal of 10120221111 is 11112202101.

It is not a de Polignac number, because 10120221111 - 2¹¹ = 10120219063 is a prime.

It is a super-4 number, since 4×10120221111⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120221113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120151 + ... + 186216.

Almost surely, 2^10120221111 is an apocalyptic number.

10120221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10120221111 is a deficient number, since it is larger than the sum of its proper divisors (8134409801).

10120221111 is a wasteful number, since it uses less digits than its factorization.

10120221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306412 (or 306401 counting only the distinct ones).

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

Adding to 10120221111 its reverse (11112202101), we get a palindrome (21232423212).

The spelling of 10120221111 in words is "ten billion, one hundred twenty million, two hundred twenty-one thousand, one hundred eleven".