1211021111022 has 64 divisors (see below), whose sum is σ = 2452162014720. Its totient is φ = 398687702400.

The previous prime is 1211021111021. The next prime is 1211021111081. The reversal of 1211021111022 is 2201111201121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211021110992 and 1211021111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021111021) 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, 152652168 + ... + 152660100.

It is an arithmetic number, because the mean of its divisors is an integer number (38315031480).

Almost surely, 2^{1211021111022} is an apocalyptic number.

1211021111022 is an abundant number, since it is smaller than the sum of its proper divisors (1241140903698).

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

1211021111022 is a wasteful number, since it uses less digits than its factorization.

1211021111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969.

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

Adding to 1211021111022 its reverse (2201111201121), we get a palindrome (3412132312143).

Subtracting 1211021111022 from its reverse (2201111201121), we obtain a palindrome (990090090099).

The spelling of 1211021111022 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred eleven thousand, twenty-two".