20120427041221 has 6 divisors (see below), whose sum is σ = 21787207979730. Its totient is φ = 18572701884048.

The previous prime is 20120427041173. The next prime is 20120427041269. The reversal of 20120427041221 is 12214072402102.

It is an interprime number because it is at equal distance from previous prime (20120427041173) and next prime (20120427041269).

It can be written as a sum of positive squares in 3 ways, for example, as 2127441030625 + 17992986010596 = 1458575^2 + 4241814^2 .

It is not a de Polignac number, because 20120427041221 - 2³⁵ = 20086067302853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120427041221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120427041521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59527890486 + ... + 59527890823.

It is an arithmetic number, because the mean of its divisors is an integer number (3631201329955).

Almost surely, 2^{20120427041221} is an apocalyptic number.

It is an amenable number.

20120427041221 is a deficient number, since it is larger than the sum of its proper divisors (1666780938509).

20120427041221 is a wasteful number, since it uses less digits than its factorization.

20120427041221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119055781335 (or 119055781322 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 20120427041221 its reverse (12214072402102), we get a palindrome (32334499443323).

The spelling of 20120427041221 in words is "twenty trillion, one hundred twenty billion, four hundred twenty-seven million, forty-one thousand, two hundred twenty-one".