1220211100019 has 4 divisors (see below), whose sum is σ = 1220366094696. Its totient is φ = 1220056105344.

The previous prime is 1220211099977. The next prime is 1220211100051. The reversal of 1220211100019 is 9100011120221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220211100019 is a prime.

It is a super-2 number, since 2×1220211100019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220211100079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77485529 + ... + 77501274.

It is an arithmetic number, because the mean of its divisors is an integer number (305091523674).

Almost surely, 2^{1220211100019} is an apocalyptic number.

1220211100019 is a deficient number, since it is larger than the sum of its proper divisors (154994677).

1220211100019 is an equidigital number, since it uses as much as digits as its factorization.

1220211100019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154994676.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1220211100019 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred thousand, nineteen".