10111121012220 has 24 divisors (see below), whose sum is σ = 28311138834384. Its totient is φ = 2696298936576.

The previous prime is 10111121012197. The next prime is 10111121012263. The reversal of 10111121012220 is 2221012111101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10111121012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84259341709 + ... + 84259341828.

It is an arithmetic number, because the mean of its divisors is an integer number (1179630784766).

Almost surely, 2^{10111121012220} is an apocalyptic number.

10111121012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111121012220 is an abundant number, since it is smaller than the sum of its proper divisors (18200017822164).

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

10111121012220 is a wasteful number, since it uses less digits than its factorization.

10111121012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168518683549 (or 168518683547 counting only the distinct ones).

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

Adding to 10111121012220 its reverse (2221012111101), we get a palindrome (12332133123321).

The spelling of 10111121012220 in words is "ten trillion, one hundred eleven billion, one hundred twenty-one million, twelve thousand, two hundred twenty".