1211121012201 has 8 divisors (see below), whose sum is σ = 1619481700704. Its totient is φ = 805087165920.

The previous prime is 1211121012191. The next prime is 1211121012239. The reversal of 1211121012201 is 1022101211121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211121012201 - 2⁵ = 1211121012169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211121010201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581709340 + ... + 581711421.

It is an arithmetic number, because the mean of its divisors is an integer number (202435212588).

Almost surely, 2^{1211121012201} is an apocalyptic number.

It is an amenable number.

1211121012201 is a deficient number, since it is larger than the sum of its proper divisors (408360688503).

1211121012201 is a wasteful number, since it uses less digits than its factorization.

1211121012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163421111.

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

Adding to 1211121012201 its reverse (1022101211121), we get a palindrome (2233222223322).

The spelling of 1211121012201 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, twelve thousand, two hundred one".