1211021102011 has 8 divisors (see below), whose sum is σ = 1406713037024. Its totient is φ = 1021001397120.

The previous prime is 1211021101991. The next prime is 1211021102099. The reversal of 1211021102011 is 1102011201121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1211021102011 - 2⁷ = 1211021101883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211021101982 and 1211021102000.

It is not an unprimeable number, because it can be changed into a prime (1211021102311) 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, 1418057070 + ... + 1418057923.

It is an arithmetic number, because the mean of its divisors is an integer number (175839129628).

Almost surely, 2^{1211021102011} is an apocalyptic number.

1211021102011 is a deficient number, since it is larger than the sum of its proper divisors (195691935013).

1211021102011 is an equidigital number, since it uses as much as digits as its factorization.

1211021102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836115061.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211021102011 its reverse (1102011201121), we get a palindrome (2313032303132).

The spelling of 1211021102011 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred two thousand, eleven".