1210121213311 has 8 divisors (see below), whose sum is σ = 1281704156640. Its totient is φ = 1138582641408.

The previous prime is 1210121213291. The next prime is 1210121213341. The reversal of 1210121213311 is 1133121210121.

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 1210121213311 - 2¹⁷ = 1210121082239 is a prime.

It is a super-3 number, since 3×1210121213311³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121213341) 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, 11036691 + ... + 11145796.

It is an arithmetic number, because the mean of its divisors is an integer number (160213019580).

Almost surely, 2^{1210121213311} is an apocalyptic number.

1210121213311 is a deficient number, since it is larger than the sum of its proper divisors (71582943329).

1210121213311 is a wasteful number, since it uses less digits than its factorization.

1210121213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22185713.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1210121213311 its reverse (1133121210121), we get a palindrome (2343242423432).

The spelling of 1210121213311 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred eleven".