102020515311 has 32 divisors (see below), whose sum is σ = 169208863488. Its totient is φ = 53717091840.

The previous prime is 102020515309. The next prime is 102020515319. The reversal of 102020515311 is 113515020201.

It is not a de Polignac number, because 102020515311 - 2¹ = 102020515309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020515319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6987121 + ... + 7001706.

It is an arithmetic number, because the mean of its divisors is an integer number (5287776984).

Almost surely, 2^102020515311 is an apocalyptic number.

102020515311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102020515311 is a deficient number, since it is larger than the sum of its proper divisors (67188348177).

102020515311 is a wasteful number, since it uses less digits than its factorization.

102020515311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13988871.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 102020515311 its reverse (113515020201), we get a palindrome (215535535512).

The spelling of 102020515311 in words is "one hundred two billion, twenty million, five hundred fifteen thousand, three hundred eleven".