2121929941 has 4 divisors (see below), whose sum is σ = 2124923500. Its totient is φ = 2118936384.

The previous prime is 2121929939. The next prime is 2121929951. The reversal of 2121929941 is 1499291212.

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 704106225 + 1417823716 = 26535^2 + 37654^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121929941 - 2¹ = 2121929939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121929894 and 2121929903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121929951) 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, 1495716 + ... + 1497133.

It is an arithmetic number, because the mean of its divisors is an integer number (531230875).

Almost surely, 2^2121929941 is an apocalyptic number.

It is an amenable number.

2121929941 is a deficient number, since it is larger than the sum of its proper divisors (2993559).

2121929941 is an equidigital number, since it uses as much as digits as its factorization.

2121929941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993558.

The product of its digits is 23328, while the sum is 40.

The square root of 2121929941 is about 46064.4107853341. The cubic root of 2121929941 is about 1285.0213607556.

The spelling of 2121929941 in words is "two billion, one hundred twenty-one million, nine hundred twenty-nine thousand, nine hundred forty-one".