1211220026 has 16 divisors (see below), whose sum is σ = 1847881728. Its totient is φ = 595273200.

The previous prime is 1211220019. The next prime is 1211220047. The reversal of 1211220026 is 6200221121.

It is a junction number, because it is equal to n+sod(n) for n = 1211219986 and 1211220013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255191 + ... + 259893.

It is an arithmetic number, because the mean of its divisors is an integer number (115492608).

Almost surely, 2^1211220026 is an apocalyptic number.

1211220026 is a deficient number, since it is larger than the sum of its proper divisors (636661702).

1211220026 is a wasteful number, since it uses less digits than its factorization.

1211220026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6877.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1211220026 is about 34802.5864843405. The cubic root of 1211220026 is about 1065.9602603849.

Adding to 1211220026 its reverse (6200221121), we get a palindrome (7411441147).

The spelling of 1211220026 in words is "one billion, two hundred eleven million, two hundred twenty thousand, twenty-six".