1220001200111 has 8 divisors (see below), whose sum is σ = 1236783400800. Its totient is φ = 1203220887552.

The previous prime is 1220001200083. The next prime is 1220001200219. The reversal of 1220001200111 is 1110021000221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220001200111 - 2²² = 1219997005807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220001200092 and 1220001200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220001200711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854606 + ... + 1780548.

It is an arithmetic number, because the mean of its divisors is an integer number (154597925100).

Almost surely, 2^{1220001200111} is an apocalyptic number.

1220001200111 is a deficient number, since it is larger than the sum of its proper divisors (16782200689).

1220001200111 is an equidigital number, since it uses as much as digits as its factorization.

1220001200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944065.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220001200111 its reverse (1110021000221), we get a palindrome (2330022200332).

The spelling of 1220001200111 in words is "one trillion, two hundred twenty billion, one million, two hundred thousand, one hundred eleven".