1221420014020 has 12 divisors (see below), whose sum is σ = 2564982029484. Its totient is φ = 488568005600.

The previous prime is 1221420014011. The next prime is 1221420014041. The reversal of 1221420014020 is 204100241221.

It can be written as a sum of positive squares in 2 ways, for example, as 358427321344 + 862992692676 = 598688^2 + 928974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30535500331 + ... + 30535500370.

It is an arithmetic number, because the mean of its divisors is an integer number (213748502457).

Almost surely, 2^{1221420014020} is an apocalyptic number.

1221420014020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221420014020 is an abundant number, since it is smaller than the sum of its proper divisors (1343562015464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221420014020 is a wasteful number, since it uses less digits than its factorization.

1221420014020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61071000710 (or 61071000708 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1221420014020 its reverse (204100241221), we get a palindrome (1425520255241).

The spelling of 1221420014020 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, fourteen thousand, twenty".