121272502110 has 64 divisors (see below), whose sum is σ = 295305606144. Its totient is φ = 31867404800.

The previous prime is 121272502061. The next prime is 121272502133. The reversal of 121272502110 is 11205272121.

It is a happy number.

It is a super-4 number, since 4×121272502110⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4431670 + ... + 4458950.

It is an arithmetic number, because the mean of its divisors is an integer number (4614150096).

Almost surely, 2^121272502110 is an apocalyptic number.

121272502110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121272502110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147652803072).

121272502110 is an abundant number, since it is smaller than the sum of its proper divisors (174033104034).

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

121272502110 is a wasteful number, since it uses less digits than its factorization.

121272502110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29449.

The product of its (nonzero) digits is 560, while the sum is 24.

Adding to 121272502110 its reverse (11205272121), we get a palindrome (132477774231).

The spelling of 121272502110 in words is "one hundred twenty-one billion, two hundred seventy-two million, five hundred two thousand, one hundred ten".