1211000111022 has 64 divisors (see below), whose sum is σ = 2701682081280. Its totient is φ = 359308946304.

The previous prime is 1211000111021. The next prime is 1211000111039. The reversal of 1211000111022 is 2201110001121.

It is a junction number, because it is equal to n+sod(n) for n = 1211000110989 and 1211000111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1440063 + ... + 2120325.

It is an arithmetic number, because the mean of its divisors is an integer number (42213782520).

Almost surely, 2^{1211000111022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211000111022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350841040640).

1211000111022 is an abundant number, since it is smaller than the sum of its proper divisors (1490681970258).

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

1211000111022 is a wasteful number, since it uses less digits than its factorization.

1211000111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681097.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211000111022 its reverse (2201110001121), we get a palindrome (3412110112143).

The spelling of 1211000111022 in words is "one trillion, two hundred eleven billion, one hundred eleven thousand, twenty-two".