1200202121161 has 2 divisors, whose sum is σ = 1200202121162. Its totient is φ = 1200202121160.

The previous prime is 1200202121123. The next prime is 1200202121213. The reversal of 1200202121161 is 1611212020021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1038501626761 + 161700494400 = 1019069^2 + 402120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200202121161 - 2³⁷ = 1062763167689 is a prime.

It is a super-3 number, since 3×1200202121161³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1200202191161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600101060580 + 600101060581.

It is an arithmetic number, because the mean of its divisors is an integer number (600101060581).

Almost surely, 2^{1200202121161} is an apocalyptic number.

It is an amenable number.

1200202121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200202121161 is an equidigital number, since it uses as much as digits as its factorization.

1200202121161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1200202121161 its reverse (1611212020021), we get a palindrome (2811414141182).

The spelling of 1200202121161 in words is "one trillion, two hundred billion, two hundred two million, one hundred twenty-one thousand, one hundred sixty-one".