1211222021122 has 16 divisors (see below), whose sum is σ = 1841773944960. Its totient is φ = 597313564848.

The previous prime is 1211222021101. The next prime is 1211222021123. The reversal of 1211222021122 is 2211202221121.

It is a super-2 number, since 2×1211222021122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211222021122.

It is not an unprimeable number, because it can be changed into a prime (1211222021123) 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, 3897873 + ... + 4197124.

It is an arithmetic number, because the mean of its divisors is an integer number (115110871560).

Almost surely, 2^{1211222021122} is an apocalyptic number.

1211222021122 is a deficient number, since it is larger than the sum of its proper divisors (630551923838).

1211222021122 is an equidigital number, since it uses as much as digits as its factorization.

1211222021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096025.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1211222021122 its reverse (2211202221121), we get a palindrome (3422424242243).

The spelling of 1211222021122 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-two".