1212202022121 has 48 divisors (see below), whose sum is σ = 1779475698000. Its totient is φ = 795091023360.

The previous prime is 1212202022077. The next prime is 1212202022137.

It is a happy number.

1212202022121 is a `hidden beast` number, since 121 + 220 + 202 + 2 + 121 = 666.

1212202022121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 12782789721 + 1199419232400 = 113061^2 + 1095180^2 .

It is not a de Polignac number, because 1212202022121 - 2¹⁴ = 1212202005737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212202022094 and 1212202022103.

It is not an unprimeable number, because it can be changed into a prime (1212202022621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125885935 + ... + 125895563.

It is an arithmetic number, because the mean of its divisors is an integer number (37072410375).

Almost surely, 2^{1212202022121} is an apocalyptic number.

It is an amenable number.

1212202022121 is a deficient number, since it is larger than the sum of its proper divisors (567273675879).

1212202022121 is a wasteful number, since it uses less digits than its factorization.

1212202022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10634 (or 10631 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 1212202022121 in words is "one trillion, two hundred twelve billion, two hundred two million, twenty-two thousand, one hundred twenty-one".