121420135154 has 8 divisors (see below), whose sum is σ = 182133223920. Its totient is φ = 60709060516.

The previous prime is 121420135099. The next prime is 121420135171. The reversal of 121420135154 is 451531024121.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342524 + ... + 600135.

It is an arithmetic number, because the mean of its divisors is an integer number (22766652990).

Almost surely, 2^121420135154 is an apocalyptic number.

121420135154 is a deficient number, since it is larger than the sum of its proper divisors (60713088766).

121420135154 is an equidigital number, since it uses as much as digits as its factorization.

121420135154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007064.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 121420135154 its reverse (451531024121), we get a palindrome (572951159275).

The spelling of 121420135154 in words is "one hundred twenty-one billion, four hundred twenty million, one hundred thirty-five thousand, one hundred fifty-four".