69721242120 has 48 divisors (see below), whose sum is σ = 226594038060. Its totient is φ = 18592331136.

The previous prime is 69721242067. The next prime is 69721242131. The reversal of 69721242120 is 2124212796.

It can be written as a sum of positive squares in 2 ways, for example, as 66715790436 + 3005451684 = 258294^2 + 54822^2 .

It is a super-2 number, since 2×69721242120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96834699 + ... + 96835418.

Almost surely, 2^69721242120 is an apocalyptic number.

69721242120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69721242120 is an abundant number, since it is smaller than the sum of its proper divisors (156872795940).

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

69721242120 is a wasteful number, since it uses less digits than its factorization.

69721242120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193670134 (or 193670127 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 69721242120 in words is "sixty-nine billion, seven hundred twenty-one million, two hundred forty-two thousand, one hundred twenty".