121420542523 has 8 divisors (see below), whose sum is σ = 141118306560. Its totient is φ = 102310771560.

The previous prime is 121420542499. The next prime is 121420542541. The reversal of 121420542523 is 325245024121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121420542523 - 2⁵ = 121420542491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121420542223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146997823 + ... + 146998648.

It is an arithmetic number, because the mean of its divisors is an integer number (17639788320).

Almost surely, 2^121420542523 is an apocalyptic number.

121420542523 is a deficient number, since it is larger than the sum of its proper divisors (19697764037).

121420542523 is an equidigital number, since it uses as much as digits as its factorization.

121420542523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293996537.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 121420542523 its reverse (325245024121), we get a palindrome (446665566644).

The spelling of 121420542523 in words is "one hundred twenty-one billion, four hundred twenty million, five hundred forty-two thousand, five hundred twenty-three".