1021212211110 has 128 divisors (see below), whose sum is σ = 3098031197184. Its totient is φ = 209641167360.

The previous prime is 1021212211039. The next prime is 1021212211111. The reversal of 1021212211110 is 111122121201.

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 1021212211110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212211111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4953996 + ... + 5156015.

It is an arithmetic number, because the mean of its divisors is an integer number (24203368728).

Almost surely, 2^{1021212211110} is an apocalyptic number.

1021212211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021212211110 is an abundant number, since it is smaller than the sum of its proper divisors (2076818986074).

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

1021212211110 is a wasteful number, since it uses less digits than its factorization.

1021212211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110078.

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

Adding to 1021212211110 its reverse (111122121201), we get a palindrome (1132334332311).

The spelling of 1021212211110 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred ten".