2150121403121 has 4 divisors (see below), whose sum is σ = 2224263520500. Its totient is φ = 2075979285744.

The previous prime is 2150121403103. The next prime is 2150121403127. The reversal of 2150121403121 is 1213041210512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1366783119025 + 783338284096 = 1169095^2 + 885064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150121403121 - 2²² = 2150117208817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2150121403127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37071058646 + ... + 37071058703.

It is an arithmetic number, because the mean of its divisors is an integer number (556065880125).

Almost surely, 2^{2150121403121} is an apocalyptic number.

It is an amenable number.

2150121403121 is a deficient number, since it is larger than the sum of its proper divisors (74142117379).

2150121403121 is an equidigital number, since it uses as much as digits as its factorization.

2150121403121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74142117378.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 2150121403121 its reverse (1213041210512), we get a palindrome (3363162613633).

The spelling of 2150121403121 in words is "two trillion, one hundred fifty billion, one hundred twenty-one million, four hundred three thousand, one hundred twenty-one".