1221122000101 has 4 divisors (see below), whose sum is σ = 1227320589132. Its totient is φ = 1214923411072.

The previous prime is 1221122000089. The next prime is 1221122000123. The reversal of 1221122000101 is 1010002211221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1157227305025 + 63894695076 = 1075745^2 + 252774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221122000101 - 2⁷ = 1221121999973 is a prime.

It is a super-2 number, since 2×1221122000101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122000141) 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, 3099294220 + ... + 3099294613.

It is an arithmetic number, because the mean of its divisors is an integer number (306830147283).

Almost surely, 2^{1221122000101} is an apocalyptic number.

It is an amenable number.

1221122000101 is a deficient number, since it is larger than the sum of its proper divisors (6198589031).

1221122000101 is an equidigital number, since it uses as much as digits as its factorization.

1221122000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6198589030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221122000101 its reverse (1010002211221), we get a palindrome (2231124211322).

The spelling of 1221122000101 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred one", and thus it is an aban number.