21222401010 has 32 divisors (see below), whose sum is σ = 53929867392. Its totient is φ = 5326406400.

The previous prime is 21222401003. The next prime is 21222401029. The reversal of 21222401010 is 1010422212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20805766 + ... + 20806785.

It is an arithmetic number, because the mean of its divisors is an integer number (1685308356).

Almost surely, 2^21222401010 is an apocalyptic number.

21222401010 is an abundant number, since it is smaller than the sum of its proper divisors (32707466382).

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

21222401010 is a wasteful number, since it uses less digits than its factorization.

21222401010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41612578.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21222401010 its reverse (1010422212), we get a palindrome (22232823222).

The spelling of 21222401010 in words is "twenty-one billion, two hundred twenty-two million, four hundred one thousand, ten".