1212203212001 has 32 divisors (see below), whose sum is σ = 1284900757920. Its totient is φ = 1142229344256.

The previous prime is 1212203211949. The next prime is 1212203212013. The reversal of 1212203212001 is 1002123022121.

It can be written as a sum of positive squares in 16 ways, for example, as 127574694976 + 1084628517025 = 357176^2 + 1041455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212203212001 - 2²⁶ = 1212136103137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212203212021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107678765 + ... + 107690021.

It is an arithmetic number, because the mean of its divisors is an integer number (40153148685).

Almost surely, 2^{1212203212001} is an apocalyptic number.

It is an amenable number.

1212203212001 is a deficient number, since it is larger than the sum of its proper divisors (72697545919).

1212203212001 is a wasteful number, since it uses less digits than its factorization.

1212203212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12053.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212203212001 its reverse (1002123022121), we get a palindrome (2214326234122).

The spelling of 1212203212001 in words is "one trillion, two hundred twelve billion, two hundred three million, two hundred twelve thousand, one".