1211101026 has 16 divisors (see below), whose sum is σ = 2440693728. Its totient is φ = 400618400.

The previous prime is 1211101019. The next prime is 1211101027. The reversal of 1211101026 is 6201011121.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211100996 and 1211101014.

It is not an unprimeable number, because it can be changed into a prime (1211101027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769635 + ... + 771206.

It is an arithmetic number, because the mean of its divisors is an integer number (152543358).

Almost surely, 2^1211101026 is an apocalyptic number.

1211101026 is an abundant number, since it is smaller than the sum of its proper divisors (1229592702).

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

1211101026 is a wasteful number, since it uses less digits than its factorization.

1211101026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540977.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1211101026 is about 34800.8767992992. The cubic root of 1211101026 is about 1065.9253497375.

Adding to 1211101026 its reverse (6201011121), we get a palindrome (7412112147).

The spelling of 1211101026 in words is "one billion, two hundred eleven million, one hundred one thousand, twenty-six".