1222200021001 has 2 divisors, whose sum is σ = 1222200021002. Its totient is φ = 1222200021000.

The previous prime is 1222200020959. The next prime is 1222200021023. The reversal of 1222200021001 is 1001200022221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096887560976 + 125312460025 = 1047324^2 + 353995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222200021001 - 2²³ = 1222191632393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222200021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611100010500 + 611100010501.

It is an arithmetic number, because the mean of its divisors is an integer number (611100010501).

Almost surely, 2^{1222200021001} is an apocalyptic number.

It is an amenable number.

1222200021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222200021001 is an equidigital number, since it uses as much as digits as its factorization.

1222200021001 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 13.

Adding to 1222200021001 its reverse (1001200022221), we get a palindrome (2223400043222).

It can be divided in two parts, 12222000 and 21001, that added together give a square (12243001 = 3499²).

The spelling of 1222200021001 in words is "one trillion, two hundred twenty-two billion, two hundred million, twenty-one thousand, one".