1220010010101 has 6 divisors (see below), whose sum is σ = 1762236681270. Its totient is φ = 813340006728.

The previous prime is 1220010010099. The next prime is 1220010010103. The reversal of 1220010010101 is 1010100100221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220010010099) and next prime (1220010010103).

It can be written as a sum of positive squares in only one way, i.e., 620274380625 + 599735629476 = 787575^2 + 774426^2 .

It is not a de Polignac number, because 1220010010101 - 2¹ = 1220010010099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 135556667789 = 1220010010101 / (1 + 2 + 2 + 0 + 0 + 1 + 0 + 0 + 1 + 0 + 1 + 0 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220010010103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67778333886 + ... + 67778333903.

It is an arithmetic number, because the mean of its divisors is an integer number (293706113545).

Almost surely, 2^{1220010010101} is an apocalyptic number.

It is an amenable number.

1220010010101 is a deficient number, since it is larger than the sum of its proper divisors (542226671169).

1220010010101 is a wasteful number, since it uses less digits than its factorization.

1220010010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135556667795 (or 135556667792 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1220010010101 its reverse (1010100100221), we get a palindrome (2230110110322).

The spelling of 1220010010101 in words is "one trillion, two hundred twenty billion, ten million, ten thousand, one hundred one".