1222020121001 has 2 divisors, whose sum is σ = 1222020121002. Its totient is φ = 1222020121000.

The previous prime is 1222020120943. The next prime is 1222020121009. The reversal of 1222020121001 is 1001210202221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 922128075625 + 299892045376 = 960275^2 + 547624^2 .

It is an emirp because it is prime and its reverse (1001210202221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222020121001 - 2³⁴ = 1204840251817 is a prime.

It is a super-2 number, since 2×1222020121001² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222020121009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611010060500 + 611010060501.

It is an arithmetic number, because the mean of its divisors is an integer number (611010060501).

Almost surely, 2^{1222020121001} is an apocalyptic number.

It is an amenable number.

1222020121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222020121001 is an equidigital number, since it uses as much as digits as its factorization.

1222020121001 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 1222020121001 its reverse (1001210202221), we get a palindrome (2223230323222).

The spelling of 1222020121001 in words is "one trillion, two hundred twenty-two billion, twenty million, one hundred twenty-one thousand, one".