1212201121021 has 8 divisors (see below), whose sum is σ = 1322451084384. Its totient is φ = 1101959467920.

The previous prime is 1212201120967. The next prime is 1212201121031. The reversal of 1212201121021 is 1201211022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212201121021 - 2³³ = 1203611186429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212201120986 and 1212201121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212201121031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770591 + ... + 2357836.

It is an arithmetic number, because the mean of its divisors is an integer number (165306385548).

Almost surely, 2^{1212201121021} is an apocalyptic number.

1212201121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212201121021 is a deficient number, since it is larger than the sum of its proper divisors (110249963363).

1212201121021 is a wasteful number, since it uses less digits than its factorization.

1212201121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155131.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212201121021 its reverse (1201211022121), we get a palindrome (2413412143142).

The spelling of 1212201121021 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred twenty-one thousand, twenty-one".