102240420211 has 4 divisors (see below), whose sum is σ = 102242371000. Its totient is φ = 102238469424.

The previous prime is 102240420181. The next prime is 102240420259. The reversal of 102240420211 is 112024042201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102240420211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102240421211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894546 + ... + 1002343.

It is an arithmetic number, because the mean of its divisors is an integer number (25560592750).

Almost surely, 2^102240420211 is an apocalyptic number.

102240420211 is a deficient number, since it is larger than the sum of its proper divisors (1950789).

102240420211 is an equidigital number, since it uses as much as digits as its factorization.

102240420211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950788.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 102240420211 its reverse (112024042201), we get a palindrome (214264462412).

The spelling of 102240420211 in words is "one hundred two billion, two hundred forty million, four hundred twenty thousand, two hundred eleven".