1213121233101 has 16 divisors (see below), whose sum is σ = 1635019591680. Its totient is φ = 800030002800.

The previous prime is 1213121233091. The next prime is 1213121233133. The reversal of 1213121233101 is 1013321213121.

It is a de Polignac number, because none of the positive numbers 2^k-1213121233101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213121233141) 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, 5494185 + ... + 5710718.

It is an arithmetic number, because the mean of its divisors is an integer number (102188724480).

Almost surely, 2^{1213121233101} is an apocalyptic number.

It is an amenable number.

1213121233101 is a deficient number, since it is larger than the sum of its proper divisors (421898358579).

1213121233101 is a wasteful number, since it uses less digits than its factorization.

1213121233101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205296.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1213121233101 its reverse (1013321213121), we get a palindrome (2226442446222).

The spelling of 1213121233101 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred one".