121397243762 has 4 divisors (see below), whose sum is σ = 182095865646. Its totient is φ = 60698621880.

The previous prime is 121397243711. The next prime is 121397243767. The reversal of 121397243762 is 267342793121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 102375041521 + 19022202241 = 319961^2 + 137921^2 .

It is not an unprimeable number, because it can be changed into a prime (121397243767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30349310939 + ... + 30349310942.

Almost surely, 2^121397243762 is an apocalyptic number.

121397243762 is a deficient number, since it is larger than the sum of its proper divisors (60698621884).

121397243762 is an equidigital number, since it uses as much as digits as its factorization.

121397243762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60698621883.

The product of its digits is 762048, while the sum is 47.

The spelling of 121397243762 in words is "one hundred twenty-one billion, three hundred ninety-seven million, two hundred forty-three thousand, seven hundred sixty-two".