1220111020101 has 32 divisors (see below), whose sum is σ = 1726109568000. Its totient is φ = 764465845248.

The previous prime is 1220111020087. The next prime is 1220111020187. The reversal of 1220111020101 is 1010201110221.

It is not a de Polignac number, because 1220111020101 - 2³⁵ = 1185751281733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111020001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3794890 + ... + 4103828.

It is an arithmetic number, because the mean of its divisors is an integer number (53940924000).

Almost surely, 2^{1220111020101} is an apocalyptic number.

It is an amenable number.

1220111020101 is a deficient number, since it is larger than the sum of its proper divisors (505998547899).

1220111020101 is a wasteful number, since it uses less digits than its factorization.

1220111020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309513.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1220111020101 its reverse (1010201110221), we get a palindrome (2230312130322).

The spelling of 1220111020101 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty thousand, one hundred one".