10111121020 has 96 divisors (see below), whose sum is σ = 28509175296. Its totient is φ = 2909088000.

The previous prime is 10111121003. The next prime is 10111121039. The reversal of 10111121020 is 2012111101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10111120988 and 10111121006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232506 + ... + 272545.

It is an arithmetic number, because the mean of its divisors is an integer number (296970576).

Almost surely, 2^10111121020 is an apocalyptic number.

10111121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111121020 is an abundant number, since it is smaller than the sum of its proper divisors (18398054276).

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

10111121020 is a wasteful number, since it uses less digits than its factorization.

10111121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505091 (or 505089 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10111121020 its reverse (2012111101), we get a palindrome (12123232121).

It can be divided in two parts, 10111 and 121020, that added together give a palindrome (131131).

The spelling of 10111121020 in words is "ten billion, one hundred eleven million, one hundred twenty-one thousand, twenty".