11201212111961 has 2 divisors, whose sum is σ = 11201212111962. Its totient is φ = 11201212111960.

The previous prime is 11201212111949. The next prime is 11201212112017. The reversal of 11201212111961 is 16911121210211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8645511105625 + 2555701006336 = 2940325^2 + 1598656^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201212111961 - 2⁶ = 11201212111897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11201212111561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600606055980 + 5600606055981.

It is an arithmetic number, because the mean of its divisors is an integer number (5600606055981).

Almost surely, 2^{11201212111961} is an apocalyptic number.

It is an amenable number.

11201212111961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201212111961 is an equidigital number, since it uses as much as digits as its factorization.

11201212111961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 29.

The spelling of 11201212111961 in words is "eleven trillion, two hundred one billion, two hundred twelve million, one hundred eleven thousand, nine hundred sixty-one".