221121300010 has 32 divisors (see below), whose sum is σ = 429153645312. Its totient is φ = 81546024000.

The previous prime is 221121299989. The next prime is 221121300011. The reversal of 221121300010 is 10003121122.

It is a super-2 number, since 2×221121300010² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (221121300011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920866 + ... + 1135885.

It is an arithmetic number, because the mean of its divisors is an integer number (13411051416).

Almost surely, 2^221121300010 is an apocalyptic number.

221121300010 is a deficient number, since it is larger than the sum of its proper divisors (208032345302).

221121300010 is a wasteful number, since it uses less digits than its factorization.

221121300010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057598.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 221121300010 its reverse (10003121122), we get a palindrome (231124421132).

The spelling of 221121300010 in words is "two hundred twenty-one billion, one hundred twenty-one million, three hundred thousand, ten".