1220221201101 has 32 divisors (see below), whose sum is σ = 1957329192960. Its totient is φ = 660543149376.

The previous prime is 1220221201081. The next prime is 1220221201109. The reversal of 1220221201101 is 1011021220221.

It is not a de Polignac number, because 1220221201101 - 2¹³ = 1220221192909 is a prime.

It is a super-2 number, since 2×1220221201101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221201109) 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, 12562815 + ... + 12659571.

It is an arithmetic number, because the mean of its divisors is an integer number (61166537280).

Almost surely, 2^{1220221201101} is an apocalyptic number.

It is an amenable number.

1220221201101 is a deficient number, since it is larger than the sum of its proper divisors (737107991859).

1220221201101 is a wasteful number, since it uses less digits than its factorization.

1220221201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128393.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220221201101 its reverse (1011021220221), we get a palindrome (2231242421322).

The spelling of 1220221201101 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred one thousand, one hundred one".