2150012021 has 4 divisors (see below), whose sum is σ = 2208120492. Its totient is φ = 2091903552.

The previous prime is 2150012017. The next prime is 2150012023. The reversal of 2150012021 is 1202100512.

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 1488802225 + 661209796 = 38585^2 + 25714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150012021 - 2² = 2150012017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2150011987 and 2150012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150012023) 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, 29054180 + ... + 29054253.

It is an arithmetic number, because the mean of its divisors is an integer number (552030123).

Almost surely, 2^2150012021 is an apocalyptic number.

It is an amenable number.

2150012021 is a deficient number, since it is larger than the sum of its proper divisors (58108471).

2150012021 is an equidigital number, since it uses as much as digits as its factorization.

2150012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58108470.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2150012021 is about 46368.2221030740. Note that the first 3 decimals coincide. The cubic root of 2150012021 is about 1290.6652861050.

Adding to 2150012021 its reverse (1202100512), we get a palindrome (3352112533).

The spelling of 2150012021 in words is "two billion, one hundred fifty million, twelve thousand, twenty-one".