11222031001261 has 2 divisors, whose sum is σ = 11222031001262. Its totient is φ = 11222031001260.

The previous prime is 11222031001231. The next prime is 11222031001331. The reversal of 11222031001261 is 16210013022211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6620298124036 + 4601732877225 = 2572994^2 + 2145165^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222031001261 - 2¹⁵ = 11222030968493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222031001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611015500630 + 5611015500631.

It is an arithmetic number, because the mean of its divisors is an integer number (5611015500631).

Almost surely, 2^{11222031001261} is an apocalyptic number.

It is an amenable number.

11222031001261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222031001261 is an equidigital number, since it uses as much as digits as its factorization.

11222031001261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11222031001261 its reverse (16210013022211), we get a palindrome (27432044023472).

The spelling of 11222031001261 in words is "eleven trillion, two hundred twenty-two billion, thirty-one million, one thousand, two hundred sixty-one".