1220212222001 has 2 divisors, whose sum is σ = 1220212222002. Its totient is φ = 1220212222000.

The previous prime is 1220212221961. The next prime is 1220212222063. The reversal of 1220212222001 is 1002222120221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196833812001 + 23378410000 = 1093999^2 + 152900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220212222001 - 2²⁶ = 1220145113137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220212222301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610106111000 + 610106111001.

It is an arithmetic number, because the mean of its divisors is an integer number (610106111001).

Almost surely, 2^{1220212222001} is an apocalyptic number.

It is an amenable number.

1220212222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220212222001 is an equidigital number, since it uses as much as digits as its factorization.

1220212222001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220212222001 its reverse (1002222120221), we get a palindrome (2222434342222).

The spelling of 1220212222001 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty-two thousand, one".