102001155020 has 24 divisors (see below), whose sum is σ = 214799104800. Its totient is φ = 40686808832.

The previous prime is 102001154999. The next prime is 102001155029. The reversal of 102001155020 is 20551100201.

It is a self number, because there is not a number n which added to its sum of digits gives 102001155020.

It is not an unprimeable number, because it can be changed into a prime (102001155029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7095965 + ... + 7110324.

It is an arithmetic number, because the mean of its divisors is an integer number (8949962700).

Almost surely, 2^102001155020 is an apocalyptic number.

102001155020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001155020 is an abundant number, since it is smaller than the sum of its proper divisors (112797949780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102001155020 is a wasteful number, since it uses less digits than its factorization.

102001155020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14206657 (or 14206655 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 102001155020 its reverse (20551100201), we get a palindrome (122552255221).

The spelling of 102001155020 in words is "one hundred two billion, one million, one hundred fifty-five thousand, twenty".