10212120111 has 8 divisors (see below), whose sum is σ = 13617547264. Its totient is φ = 6807386520.

The previous prime is 10212120077. The next prime is 10212120143. The reversal of 10212120111 is 11102121201.

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

It is not a de Polignac number, because 10212120111 - 2²¹ = 10210022959 is a prime.

It is a super-2 number, since 2×10212120111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212120311) 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, 138001 + ... + 198666.

It is an arithmetic number, because the mean of its divisors is an integer number (1702193408).

Almost surely, 2^10212120111 is an apocalyptic number.

10212120111 is a deficient number, since it is larger than the sum of its proper divisors (3405427153).

10212120111 is a wasteful number, since it uses less digits than its factorization.

10212120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346781.

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

Adding to 10212120111 its reverse (11102121201), we get a palindrome (21314241312).

It can be divided in two parts, 102121201 and 11, that multiplied together give a palindrome (1123333211).

The spelling of 10212120111 in words is "ten billion, two hundred twelve million, one hundred twenty thousand, one hundred eleven".