20120155102 has 32 divisors (see below), whose sum is σ = 31127004000. Its totient is φ = 9750325248.

The previous prime is 20120155067. The next prime is 20120155109. The reversal of 20120155102 is 20155102102.

It is a self number, because there is not a number n which added to its sum of digits gives 20120155102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120155109) 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 in 15 ways as a sum of consecutive naturals, for example, 2404558 + ... + 2412910.

It is an arithmetic number, because the mean of its divisors is an integer number (972718875).

Almost surely, 2^20120155102 is an apocalyptic number.

20120155102 is a deficient number, since it is larger than the sum of its proper divisors (11006848898).

20120155102 is a wasteful number, since it uses less digits than its factorization.

20120155102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8700.

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 20120155102 its reverse (20155102102), we get a palindrome (40275257204).

The spelling of 20120155102 in words is "twenty billion, one hundred twenty million, one hundred fifty-five thousand, one hundred two".