13421220100 has 36 divisors (see below), whose sum is σ = 29136388624. Its totient is φ = 5366213280.

The previous prime is 13421220091. The next prime is 13421220103. The reversal of 13421220100 is 102212431.

It is not an unprimeable number, because it can be changed into a prime (13421220103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219499 + ... + 273901.

Almost surely, 2^13421220100 is an apocalyptic number.

13421220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421220100 is an abundant number, since it is smaller than the sum of its proper divisors (15715168524).

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

13421220100 is a wasteful number, since it uses less digits than its factorization.

13421220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56884 (or 56877 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13421220100 its reverse (102212431), we get a palindrome (13523432531).

The spelling of 13421220100 in words is "thirteen billion, four hundred twenty-one million, two hundred twenty thousand, one hundred".