2151121450154 has 8 divisors (see below), whose sum is σ = 3249895716480. Its totient is φ = 1067822877996.

The previous prime is 2151121450129. The next prime is 2151121450207. The reversal of 2151121450154 is 4510541211512.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2151121450154.

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, 3868923194 + ... + 3868923749.

It is an arithmetic number, because the mean of its divisors is an integer number (406236964560).

Almost surely, 2^{2151121450154} is an apocalyptic number.

2151121450154 is a deficient number, since it is larger than the sum of its proper divisors (1098774266326).

2151121450154 is a wasteful number, since it uses less digits than its factorization.

2151121450154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737847084.

The product of its (nonzero) digits is 8000, while the sum is 32.

Adding to 2151121450154 its reverse (4510541211512), we get a palindrome (6661662661666).

The spelling of 2151121450154 in words is "two trillion, one hundred fifty-one billion, one hundred twenty-one million, four hundred fifty thousand, one hundred fifty-four".