2921149421 has 2 divisors, whose sum is σ = 2921149422. Its totient is φ = 2921149420.

The previous prime is 2921149417. The next prime is 2921149453. The reversal of 2921149421 is 1249411292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2725988521 + 195160900 = 52211^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2921149421 - 2² = 2921149417 is a prime.

It is a super-2 number, since 2×2921149421² = 17066227879617270482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2921149411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460574710 + 1460574711.

It is an arithmetic number, because the mean of its divisors is an integer number (1460574711).

Almost surely, 2^2921149421 is an apocalyptic number.

It is an amenable number.

2921149421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921149421 is an equidigital number, since it uses as much as digits as its factorization.

2921149421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 2921149421 is about 54047.6587929579. The cubic root of 2921149421 is about 1429.5014189288.

The spelling of 2921149421 in words is "two billion, nine hundred twenty-one million, one hundred forty-nine thousand, four hundred twenty-one".