1221122200101 has 64 divisors (see below), whose sum is σ = 1822441420800. Its totient is φ = 722765223936.

The previous prime is 1221122200079. The next prime is 1221122200121. The reversal of 1221122200101 is 1010022211221.

It is not a de Polignac number, because 1221122200101 - 2¹³ = 1221122191909 is a prime.

It is a super-2 number, since 2×1221122200101² (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 (1221122200121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 463774681 + ... + 463777313.

It is an arithmetic number, because the mean of its divisors is an integer number (28475647200).

Almost surely, 2^{1221122200101} is an apocalyptic number.

It is an amenable number.

1221122200101 is a deficient number, since it is larger than the sum of its proper divisors (601319220699).

1221122200101 is a wasteful number, since it uses less digits than its factorization.

1221122200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538.

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

Adding to 1221122200101 its reverse (1010022211221), we get a palindrome (2231144411322).

The spelling of 1221122200101 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred thousand, one hundred one".