1201210121011 has 8 divisors (see below), whose sum is σ = 1312897590144. Its totient is φ = 1094081324160.

The previous prime is 1201210120997. The next prime is 1201210121063. The reversal of 1201210121011 is 1101210121021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1201210121011 - 2⁹ = 1201210120499 is a prime.

It is a super-2 number, since 2×1201210121011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201210120982 and 1201210121000.

It is not an unprimeable number, because it can be changed into a prime (1201210121411) 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, 1139667520 + ... + 1139668573.

It is an arithmetic number, because the mean of its divisors is an integer number (164112198768).

Almost surely, 2^{1201210121011} is an apocalyptic number.

1201210121011 is a deficient number, since it is larger than the sum of its proper divisors (111687469133).

1201210121011 is a wasteful number, since it uses less digits than its factorization.

1201210121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279336141.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201210121011 its reverse (1101210121021), we get a palindrome (2302420242032).

The spelling of 1201210121011 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twenty-one thousand, eleven".