220010001010101 has 12 divisors (see below), whose sum is σ = 328750576222380. Its totient is φ = 141615632833920.

The previous prime is 220010001010003. The next prime is 220010001010139. The reversal of 220010001010101 is 101010100010022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44322239675025 + 175687761335076 = 6657495^2 + 13254726^2 .

It is not a de Polignac number, because 220010001010101 - 2¹⁰ = 220010001009077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220010001010141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421475097460 + ... + 421475097981.

It is an arithmetic number, because the mean of its divisors is an integer number (27395881351865).

Almost surely, 2^{220010001010101} is an apocalyptic number.

It is an amenable number.

220010001010101 is a deficient number, since it is larger than the sum of its proper divisors (108740575212279).

220010001010101 is a wasteful number, since it uses less digits than its factorization.

220010001010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842950195476 (or 842950195473 counting only the distinct ones).

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

Adding to 220010001010101 its reverse (101010100010022), we get a palindrome (321020101020123).

The spelling of 220010001010101 in words is "two hundred twenty trillion, ten billion, one million, ten thousand, one hundred one".