1201210121211 has 8 divisors (see below), whose sum is σ = 1601701951824. Its totient is φ = 800762519040.

The previous prime is 1201210121203. The next prime is 1201210121219. The reversal of 1201210121211 is 1121210121021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1201210121203) and next prime (1201210121219).

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

It is not a de Polignac number, because 1201210121211 - 2³ = 1201210121203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201210121219) 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, 10993686 + ... + 11102411.

It is an arithmetic number, because the mean of its divisors is an integer number (200212743978).

Almost surely, 2^{1201210121211} is an apocalyptic number.

1201210121211 is a deficient number, since it is larger than the sum of its proper divisors (400491830613).

1201210121211 is a wasteful number, since it uses less digits than its factorization.

1201210121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22114221.

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

Adding to 1201210121211 its reverse (1121210121021), we get a palindrome (2322420242232).

The spelling of 1201210121211 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".