10111220121012 has 12 divisors (see below), whose sum is σ = 23592846949056. Its totient is φ = 3370406707000.

The previous prime is 10111220120999. The next prime is 10111220121017. The reversal of 10111220121012 is 21012102211101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 10111220120982 and 10111220121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111220121017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421300838364 + ... + 421300838387.

It is an arithmetic number, because the mean of its divisors is an integer number (1966070579088).

Almost surely, 2^{10111220121012} is an apocalyptic number.

10111220121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10111220121012 is an abundant number, since it is smaller than the sum of its proper divisors (13481626828044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10111220121012 is a wasteful number, since it uses less digits than its factorization.

10111220121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842601676758 (or 842601676756 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10111220121012 its reverse (21012102211101), we get a palindrome (31123322332113).

The spelling of 10111220121012 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, twelve".