101220406 has 16 divisors (see below), whose sum is σ = 173653920. Its totient is φ = 43346880.

The previous prime is 101220377. The next prime is 101220421. The reversal of 101220406 is 604022101.

It is a self number, because there is not a number n which added to its sum of digits gives 101220406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27516 + ... + 30976.

It is an arithmetic number, because the mean of its divisors is an integer number (10853370).

Almost surely, 2^101220406 is an apocalyptic number.

101220406 is a deficient number, since it is larger than the sum of its proper divisors (72433514).

101220406 is a wasteful number, since it uses less digits than its factorization.

101220406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5559.

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

The square root of 101220406 is about 10060.8352535960. The cubic root of 101220406 is about 466.0394613749.

Adding to 101220406 its reverse (604022101), we get a palindrome (705242507).

The spelling of 101220406 in words is "one hundred one million, two hundred twenty thousand, four hundred six".