82121455371 has 16 divisors (see below), whose sum is σ = 109890479520. Its totient is φ = 54550179840.

The previous prime is 82121455337. The next prime is 82121455393. The reversal of 82121455371 is 17355412128.

It is not a de Polignac number, because 82121455371 - 2²¹ = 82119358219 is a prime.

It is a super-2 number, since 2×82121455371² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82121455301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433091 + ... + 2466611.

It is an arithmetic number, because the mean of its divisors is an integer number (6868154970).

Almost surely, 2^82121455371 is an apocalyptic number.

82121455371 is a deficient number, since it is larger than the sum of its proper divisors (27769024149).

82121455371 is a wasteful number, since it uses less digits than its factorization.

82121455371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36446.

The product of its digits is 67200, while the sum is 39.

Adding to 82121455371 its reverse (17355412128), we get a palindrome (99476867499).

The spelling of 82121455371 in words is "eighty-two billion, one hundred twenty-one million, four hundred fifty-five thousand, three hundred seventy-one".