1201022221001 has 2 divisors, whose sum is σ = 1201022221002. Its totient is φ = 1201022221000.

The previous prime is 1201022220991. The next prime is 1201022221067. The reversal of 1201022221001 is 1001222201021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079604121600 + 121418099401 = 1039040^2 + 348451^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201022221001 - 2³⁸ = 926144314057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201022221601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600511110500 + 600511110501.

It is an arithmetic number, because the mean of its divisors is an integer number (600511110501).

Almost surely, 2^{1201022221001} is an apocalyptic number.

It is an amenable number.

1201022221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201022221001 is an equidigital number, since it uses as much as digits as its factorization.

1201022221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201022221001 its reverse (1001222201021), we get a palindrome (2202244422022).

The spelling of 1201022221001 in words is "one trillion, two hundred one billion, twenty-two million, two hundred twenty-one thousand, one".