1213100131722 has 16 divisors (see below), whose sum is σ = 2426232601920. Its totient is φ = 404361320832.

The previous prime is 1213100131721. The next prime is 1213100131723. The reversal of 1213100131722 is 2271310013121.

It is an interprime number because it is at equal distance from previous prime (1213100131721) and next prime (1213100131723).

It is a super-2 number, since 2×1213100131722² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213100131692 and 1213100131701.

It is not an unprimeable number, because it can be changed into a prime (1213100131721) 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, 845383 + ... + 1772250.

It is an arithmetic number, because the mean of its divisors is an integer number (151639537620).

Almost surely, 2^{1213100131722} is an apocalyptic number.

1213100131722 is an abundant number, since it is smaller than the sum of its proper divisors (1213132470198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213100131722 is a wasteful number, since it uses less digits than its factorization.

1213100131722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694877.

The product of its (nonzero) digits is 504, while the sum is 24.

Adding to 1213100131722 its reverse (2271310013121), we get a palindrome (3484410144843).

The spelling of 1213100131722 in words is "one trillion, two hundred thirteen billion, one hundred million, one hundred thirty-one thousand, seven hundred twenty-two".