1212021111201 has 16 divisors (see below), whose sum is σ = 1621388341248. Its totient is φ = 805334504400.

The previous prime is 1212021111187. The next prime is 1212021111251. The reversal of 1212021111201 is 1021111202121.

It is a happy number.

It is not a de Polignac number, because 1212021111201 - 2⁶ = 1212021111137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212021111251) 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, 9989040 + ... + 10109646.

It is an arithmetic number, because the mean of its divisors is an integer number (101336771328).

Almost surely, 2^{1212021111201} is an apocalyptic number.

It is an amenable number.

1212021111201 is a deficient number, since it is larger than the sum of its proper divisors (409367230047).

1212021111201 is a wasteful number, since it uses less digits than its factorization.

1212021111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131692.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212021111201 its reverse (1021111202121), we get a palindrome (2233132313322).

The spelling of 1212021111201 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, two hundred one".