102123221013 has 32 divisors (see below), whose sum is σ = 165086006400. Its totient is φ = 61878470400.

The previous prime is 102123220957. The next prime is 102123221021. The reversal of 102123221013 is 310122321201.

It is a de Polignac number, because none of the positive numbers 2^k-102123221013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123221023) 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, 1316923 + ... + 1392311.

It is an arithmetic number, because the mean of its divisors is an integer number (5158937700).

Almost surely, 2^102123221013 is an apocalyptic number.

It is an amenable number.

102123221013 is a deficient number, since it is larger than the sum of its proper divisors (62962785387).

102123221013 is a wasteful number, since it uses less digits than its factorization.

102123221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79970 (or 79964 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 102123221013 its reverse (310122321201), we get a palindrome (412245542214).

The spelling of 102123221013 in words is "one hundred two billion, one hundred twenty-three million, two hundred twenty-one thousand, thirteen".