222121011012 has 24 divisors (see below), whose sum is σ = 518291029536. Its totient is φ = 74039098368.

The previous prime is 222121011011. The next prime is 222121011019. The reversal of 222121011012 is 210110121222.

It is a junction number, because it is equal to n+sod(n) for n = 222121010982 and 222121011000.

It is not an unprimeable number, because it can be changed into a prime (222121011011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856708 + ... + 1085444.

It is an arithmetic number, because the mean of its divisors is an integer number (21595459564).

Almost surely, 2^222121011012 is an apocalyptic number.

It is an amenable number.

222121011012 is an abundant number, since it is smaller than the sum of its proper divisors (296170018524).

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

222121011012 is a wasteful number, since it uses less digits than its factorization.

222121011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309667 (or 309665 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222121011012 its reverse (210110121222), we get a palindrome (432231132234).

The spelling of 222121011012 in words is "two hundred twenty-two billion, one hundred twenty-one million, eleven thousand, twelve".