10211111020 has 24 divisors (see below), whose sum is σ = 23392727568. Its totient is φ = 3713131200.

The previous prime is 10211111011. The next prime is 10211111041. The reversal of 10211111020 is 2011111201.

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 = 10211110988 and 10211111006.

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, 23206851 + ... + 23207290.

It is an arithmetic number, because the mean of its divisors is an integer number (974696982).

Almost surely, 2^10211111020 is an apocalyptic number.

10211111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211111020 is an abundant number, since it is smaller than the sum of its proper divisors (13181616548).

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

10211111020 is a wasteful number, since it uses less digits than its factorization.

10211111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46414161 (or 46414159 counting only the distinct ones).

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

Adding to 10211111020 its reverse (2011111201), we get a palindrome (12222222221).

The spelling of 10211111020 in words is "ten billion, two hundred eleven million, one hundred eleven thousand, twenty".