1220011012211 has 4 divisors (see below), whose sum is σ = 1220588397672. Its totient is φ = 1219433626752.

The previous prime is 1220011012159. The next prime is 1220011012223. The reversal of 1220011012211 is 1122101100221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220011012211 - 2¹⁸ = 1220010750067 is a prime.

It is a super-2 number, since 2×1220011012211² (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 (1220011012291) 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, 288689561 + ... + 288693786.

It is an arithmetic number, because the mean of its divisors is an integer number (305147099418).

Almost surely, 2^{1220011012211} is an apocalyptic number.

1220011012211 is a deficient number, since it is larger than the sum of its proper divisors (577385461).

1220011012211 is an equidigital number, since it uses as much as digits as its factorization.

1220011012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577385460.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220011012211 its reverse (1122101100221), we get a palindrome (2342112112432).

The spelling of 1220011012211 in words is "one trillion, two hundred twenty billion, eleven million, twelve thousand, two hundred eleven".