1222211121001 has 16 divisors (see below), whose sum is σ = 1362254362560. Its totient is φ = 1088779728960.

The previous prime is 1222211120969. The next prime is 1222211121013. The reversal of 1222211121001 is 1001211122221.

It is a cyclic number.

It is not a de Polignac number, because 1222211121001 - 2⁵ = 1222211120969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222211121041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42726 + ... + 1564048.

It is an arithmetic number, because the mean of its divisors is an integer number (85140897660).

Almost surely, 2^{1222211121001} is an apocalyptic number.

It is an amenable number.

1222211121001 is a deficient number, since it is larger than the sum of its proper divisors (140043241559).

1222211121001 is a wasteful number, since it uses less digits than its factorization.

1222211121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523496.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1222211121001 its reverse (1001211122221), we get a palindrome (2223422243222).

The spelling of 1222211121001 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, one".