1212021221201 has 16 divisors (see below), whose sum is σ = 1475429872896. Its totient is φ = 971910122496.

The previous prime is 1212021221189. The next prime is 1212021221227. The reversal of 1212021221201 is 1021221202121.

It is a cyclic number.

It is not a de Polignac number, because 1212021221201 - 2¹⁴ = 1212021204817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1212021221201.

It is not an unprimeable number, because it can be changed into a prime (1212021251201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30474296 + ... + 30514041.

It is an arithmetic number, because the mean of its divisors is an integer number (92214367056).

Almost surely, 2^{1212021221201} is an apocalyptic number.

It is an amenable number.

1212021221201 is a deficient number, since it is larger than the sum of its proper divisors (263408651695).

1212021221201 is a wasteful number, since it uses less digits than its factorization.

1212021221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60988528.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212021221201 its reverse (1021221202121), we get a palindrome (2233242423322).

The spelling of 1212021221201 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred one".