1220111005837 has 2 divisors, whose sum is σ = 1220111005838. Its totient is φ = 1220111005836.

The previous prime is 1220111005801. The next prime is 1220111005843. The reversal of 1220111005837 is 7385001110221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843374069316 + 376736936521 = 918354^2 + 613789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220111005837 - 2¹⁵ = 1220110973069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220111005799 and 1220111005808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220111005537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055502918 + 610055502919.

It is an arithmetic number, because the mean of its divisors is an integer number (610055502919).

Almost surely, 2^{1220111005837} is an apocalyptic number.

It is an amenable number.

1220111005837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111005837 is an equidigital number, since it uses as much as digits as its factorization.

1220111005837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 1220111005837 in words is "one trillion, two hundred twenty billion, one hundred eleven million, five thousand, eight hundred thirty-seven".