1220120421041 has 6 divisors (see below), whose sum is σ = 1296114080790. Its totient is φ = 1148348631296.

The previous prime is 1220120421031. The next prime is 1220120421049. The reversal of 1220120421041 is 1401240210221.

It can be written as a sum of positive squares in 3 ways, for example, as 212497950625 + 1007622470416 = 460975^2 + 1003804^2 .

It is not a de Polignac number, because 1220120421041 - 2¹⁰ = 1220120420017 is a prime.

It is a super-4 number, since 4×1220120421041⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220120421049) 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, 2110934696 + ... + 2110935273.

It is an arithmetic number, because the mean of its divisors is an integer number (216019013465).

Almost surely, 2^{1220120421041} is an apocalyptic number.

It is an amenable number.

1220120421041 is a deficient number, since it is larger than the sum of its proper divisors (75993659749).

1220120421041 is an equidigital number, since it uses as much as digits as its factorization.

1220120421041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221870003 (or 4221869986 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1220120421041 its reverse (1401240210221), we get a palindrome (2621360631262).

The spelling of 1220120421041 in words is "one trillion, two hundred twenty billion, one hundred twenty million, four hundred twenty-one thousand, forty-one".