102420220044 has 24 divisors (see below), whose sum is σ = 239275210048. Its totient is φ = 34097973840.

The previous prime is 102420220033. The next prime is 102420220051. The reversal of 102420220044 is 440022024201.

It is a super-2 number, since 2×102420220044² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102420220044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5252302 + ... + 5271765.

Almost surely, 2^102420220044 is an apocalyptic number.

It is an amenable number.

102420220044 is an abundant number, since it is smaller than the sum of its proper divisors (136854990004).

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

102420220044 is a wasteful number, since it uses less digits than its factorization.

102420220044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524885 (or 10524883 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 102420220044 its reverse (440022024201), we get a palindrome (542442244245).

The spelling of 102420220044 in words is "one hundred two billion, four hundred twenty million, two hundred twenty thousand, forty-four".