2121214503461 has 4 divisors (see below), whose sum is σ = 2245991827212. Its totient is φ = 1996437179712.

The previous prime is 2121214503413. The next prime is 2121214503509. The reversal of 2121214503461 is 1643054121212.

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

It is an interprime number because it is at equal distance from previous prime (2121214503413) and next prime (2121214503509).

It can be written as a sum of positive squares in 2 ways, for example, as 788909898436 + 1332304605025 = 888206^2 + 1154255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121214503461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121214502461) 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, 62388661850 + ... + 62388661883.

It is an arithmetic number, because the mean of its divisors is an integer number (561497956803).

Almost surely, 2^{2121214503461} is an apocalyptic number.

It is an amenable number.

2121214503461 is a deficient number, since it is larger than the sum of its proper divisors (124777323751).

2121214503461 is a wasteful number, since it uses less digits than its factorization.

2121214503461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124777323750.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 2121214503461 its reverse (1643054121212), we get a palindrome (3764268624673).

The spelling of 2121214503461 in words is "two trillion, one hundred twenty-one billion, two hundred fourteen million, five hundred three thousand, four hundred sixty-one".