1213101203311 has 16 divisors (see below), whose sum is σ = 1284139008000. Its totient is φ = 1144429070400.

The previous prime is 1213101203267. The next prime is 1213101203371. The reversal of 1213101203311 is 1133021013121.

It is not a de Polignac number, because 1213101203311 - 2²⁷ = 1212966985583 is a prime.

It is a super-2 number, since 2×1213101203311² (a number of 25 digits) contains 22 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 (1213101203371) 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, 2900511 + ... + 3292288.

It is an arithmetic number, because the mean of its divisors is an integer number (80258688000).

Almost surely, 2^{1213101203311} is an apocalyptic number.

1213101203311 is a deficient number, since it is larger than the sum of its proper divisors (71037804689).

1213101203311 is an equidigital number, since it uses as much as digits as its factorization.

1213101203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192990.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1213101203311 its reverse (1133021013121), we get a palindrome (2346122216432).

The spelling of 1213101203311 in words is "one trillion, two hundred thirteen billion, one hundred one million, two hundred three thousand, three hundred eleven".