1212020333421 has 32 divisors (see below), whose sum is σ = 1649288729088. Its totient is φ = 791595374400.

The previous prime is 1212020333411. The next prime is 1212020333431. The reversal of 1212020333421 is 1243330202121.

It is an interprime number because it is at equal distance from previous prime (1212020333411) and next prime (1212020333431).

It is not a de Polignac number, because 1212020333421 - 2¹⁴ = 1212020317037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212020333391 and 1212020333400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020333411) 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 31 ways as a sum of consecutive naturals, for example, 11157250 + ... + 11265356.

It is an arithmetic number, because the mean of its divisors is an integer number (51540272784).

Almost surely, 2^{1212020333421} is an apocalyptic number.

It is an amenable number.

1212020333421 is a deficient number, since it is larger than the sum of its proper divisors (437268395667).

1212020333421 is a wasteful number, since it uses less digits than its factorization.

1212020333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108601.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1212020333421 its reverse (1243330202121), we get a palindrome (2455350535542).

The spelling of 1212020333421 in words is "one trillion, two hundred twelve billion, twenty million, three hundred thirty-three thousand, four hundred twenty-one".