121561727262 has 8 divisors (see below), whose sum is σ = 243123454536. Its totient is φ = 40520575752.

The previous prime is 121561727207. The next prime is 121561727267. The reversal of 121561727262 is 262727165121.

It is a sphenic number, since it is the product of 3 distinct primes.

121561727262 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121561727267) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10130143933 + ... + 10130143944.

It is an arithmetic number, because the mean of its divisors is an integer number (30390431817).

Almost surely, 2^121561727262 is an apocalyptic number.

121561727262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121561727262 is a wasteful number, since it uses less digits than its factorization.

121561727262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20260287882.

The product of its digits is 141120, while the sum is 42.

The spelling of 121561727262 in words is "one hundred twenty-one billion, five hundred sixty-one million, seven hundred twenty-seven thousand, two hundred sixty-two".