154215121021121 has 8 divisors (see below), whose sum is σ = 154946409418944. Its totient is φ = 153483836501520.

The previous prime is 154215121021069. The next prime is 154215121021133. The reversal of 154215121021121 is 121120121512451.

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 154215121021121 - 2¹⁸ = 154215120758977 is a prime.

It is a super-2 number, since 2×154215121021121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154215121021141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107388980 + ... + 108815546.

It is an arithmetic number, because the mean of its divisors is an integer number (19368301177368).

Almost surely, 2^{154215121021121} is an apocalyptic number.

It is an amenable number.

154215121021121 is a deficient number, since it is larger than the sum of its proper divisors (731288397823).

154215121021121 is a wasteful number, since it uses less digits than its factorization.

154215121021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939111.

The product of its (nonzero) digits is 1600, while the sum is 29.

Adding to 154215121021121 its reverse (121120121512451), we get a palindrome (275335242533572).

The spelling of 154215121021121 in words is "one hundred fifty-four trillion, two hundred fifteen billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".