1220541141 has 4 divisors (see below), whose sum is σ = 1627388192. Its totient is φ = 813694092.

The previous prime is 1220541109. The next prime is 1220541143. The reversal of 1220541141 is 1411450221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1220541141 - 2⁵ = 1220541109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220541143) 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, 203423521 + ... + 203423526.

It is an arithmetic number, because the mean of its divisors is an integer number (406847048).

Almost surely, 2^1220541141 is an apocalyptic number.

It is an amenable number.

1220541141 is a deficient number, since it is larger than the sum of its proper divisors (406847051).

1220541141 is an equidigital number, since it uses as much as digits as its factorization.

1220541141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406847050.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1220541141 is about 34936.2439452211. The cubic root of 1220541141 is about 1068.6876918362.

Adding to 1220541141 its reverse (1411450221), we get a palindrome (2631991362).

It can be divided in two parts, 1220 and 541141, that added together give a triangular number (542361 = T₁₀₄₁).

The spelling of 1220541141 in words is "one billion, two hundred twenty million, five hundred forty-one thousand, one hundred forty-one".