1212022232421 has 128 divisors (see below), whose sum is σ = 2232784490496. Its totient is φ = 564373370880.

The previous prime is 1212022232389. The next prime is 1212022232453. The reversal of 1212022232421 is 1242322202121.

It is an interprime number because it is at equal distance from previous prime (1212022232389) and next prime (1212022232453).

It is not a de Polignac number, because 1212022232421 - 2⁵ = 1212022232389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212022232391 and 1212022232400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022236421) 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 127 ways as a sum of consecutive naturals, for example, 58100625 + ... + 58121481.

It is an arithmetic number, because the mean of its divisors is an integer number (17443628832).

Almost surely, 2^{1212022232421} is an apocalyptic number.

1212022232421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212022232421 is a deficient number, since it is larger than the sum of its proper divisors (1020762258075).

1212022232421 is a wasteful number, since it uses less digits than its factorization.

1212022232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21451.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1212022232421 its reverse (1242322202121), we get a palindrome (2454344434542).

The spelling of 1212022232421 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred thirty-two thousand, four hundred twenty-one".