121315572 has 108 divisors (see below), whose sum is σ = 360911460. Its totient is φ = 34255872.

The previous prime is 121315567. The next prime is 121315577. The reversal of 121315572 is 275513121.

It is an interprime number because it is at equal distance from previous prime (121315567) and next prime (121315577).

It can be written as a sum of positive squares in 2 ways, for example, as 33593616 + 87721956 = 5796^2 + 9366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315577) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 170754 + ... + 171462.

Almost surely, 2^121315572 is an apocalyptic number.

121315572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121315572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180455730).

121315572 is an abundant number, since it is smaller than the sum of its proper divisors (239595888).

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

121315572 is a wasteful number, since it uses less digits than its factorization.

121315572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 818 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 121315572 is about 11014.3348414691. The cubic root of 121315572 is about 495.0383563789.

Adding to 121315572 its reverse (275513121), we get a palindrome (396828693).

The spelling of 121315572 in words is "one hundred twenty-one million, three hundred fifteen thousand, five hundred seventy-two".