82121049 has 12 divisors (see below), whose sum is σ = 118776112. Its totient is φ = 54675000.

The previous prime is 82121047. The next prime is 82121057. The reversal of 82121049 is 94012128.

It is not a de Polignac number, because 82121049 - 2¹ = 82121047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82121041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674 + ... + 12924.

Almost surely, 2^82121049 is an apocalyptic number.

It is an amenable number.

82121049 is a deficient number, since it is larger than the sum of its proper divisors (36655063).

82121049 is a wasteful number, since it uses less digits than its factorization.

82121049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12068 (or 12065 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 82121049 is about 9062.0664861829. The cubic root of 82121049 is about 434.6618219812.

It can be divided in two parts, 8212 and 1049, that added together give a cube (9261 = 21³).

The spelling of 82121049 in words is "eighty-two million, one hundred twenty-one thousand, forty-nine".