11111021010 has 96 divisors (see below), whose sum is σ = 30655946880. Its totient is φ = 2786049024.

The previous prime is 11111021003. The next prime is 11111021011. The reversal of 11111021010 is 1012011111.

It is a super-2 number, since 2×11111021010² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11111020983 and 11111021001.

It is not an unprimeable number, because it can be changed into a prime (11111021011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76642 + ... + 167618.

It is an arithmetic number, because the mean of its divisors is an integer number (319332780).

Almost surely, 2^11111021010 is an apocalyptic number.

11111021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15327973440).

11111021010 is an abundant number, since it is smaller than the sum of its proper divisors (19544925870).

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

11111021010 is a wasteful number, since it uses less digits than its factorization.

11111021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91072 (or 91069 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111021010 its reverse (1012011111), we get a palindrome (12123032121).

It can be divided in two parts, 1111 and 1021010, that added together give a square (1022121 = 1011²).

The spelling of 11111021010 in words is "eleven billion, one hundred eleven million, twenty-one thousand, ten".