1021021222111 has 8 divisors (see below), whose sum is σ = 1124869466448. Its totient is φ = 919011000000.

The previous prime is 1021021222073. The next prime is 1021021222139. The reversal of 1021021222111 is 1112221201201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021021222111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021021222171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459504390 + ... + 459506611.

It is an arithmetic number, because the mean of its divisors is an integer number (140608683306).

Almost surely, 2^{1021021222111} is an apocalyptic number.

1021021222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021021222111 is a deficient number, since it is larger than the sum of its proper divisors (103848244337).

1021021222111 is a wasteful number, since it uses less digits than its factorization.

1021021222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919011113.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021021222111 its reverse (1112221201201), we get a palindrome (2133242423312).

The spelling of 1021021222111 in words is "one trillion, twenty-one billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".