2121052903 has 4 divisors (see below), whose sum is σ = 2122528320. Its totient is φ = 2119577488.

The previous prime is 2121052867. The next prime is 2121052931. The reversal of 2121052903 is 3092501212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121052903 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121052933) 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, 735550 + ... + 738427.

It is an arithmetic number, because the mean of its divisors is an integer number (530632080).

Almost surely, 2^2121052903 is an apocalyptic number.

2121052903 is a deficient number, since it is larger than the sum of its proper divisors (1475417).

2121052903 is a wasteful number, since it uses less digits than its factorization.

2121052903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475416.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2121052903 is about 46054.8901095204. The cubic root of 2121052903 is about 1284.8442942951.

The spelling of 2121052903 in words is "two billion, one hundred twenty-one million, fifty-two thousand, nine hundred three".