1212011202121 has 4 divisors (see below), whose sum is σ = 1212015991552. Its totient is φ = 1212006412692.

The previous prime is 1212011202107. The next prime is 1212011202133. The reversal of 1212011202121 is 1212021102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212011202121 - 2⁷ = 1212011201993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212011202095 and 1212011202104.

It is not an unprimeable number, because it can be changed into a prime (1212011202151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1992621 + ... + 2528746.

It is an arithmetic number, because the mean of its divisors is an integer number (303003997888).

Almost surely, 2^{1212011202121} is an apocalyptic number.

It is an amenable number.

1212011202121 is a deficient number, since it is larger than the sum of its proper divisors (4789431).

1212011202121 is an equidigital number, since it uses as much as digits as its factorization.

1212011202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789430.

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

Adding to 1212011202121 its reverse (1212021102121), we get a palindrome (2424032304242).

The spelling of 1212011202121 in words is "one trillion, two hundred twelve billion, eleven million, two hundred two thousand, one hundred twenty-one".