1011111121010 has 16 divisors (see below), whose sum is σ = 1915789492800. Its totient is φ = 383157898416.

The previous prime is 1011111120983. The next prime is 1011111121043. The reversal of 1011111121010 is 101211111101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1011111120982 and 1011111121000.

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, 2660818550 + ... + 2660818929.

It is an arithmetic number, because the mean of its divisors is an integer number (119736843300).

Almost surely, 2^{1011111121010} is an apocalyptic number.

1011111121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1011111121010 is a deficient number, since it is larger than the sum of its proper divisors (904678371790).

1011111121010 is a wasteful number, since it uses less digits than its factorization.

1011111121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321637505.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1011111121010 its reverse (101211111101), we get a palindrome (1112322232111).

Subtracting from 1011111121010 its reverse (101211111101), we obtain a palindrome (909900009909).

The spelling of 1011111121010 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, ten".