10001221122 has 8 divisors (see below), whose sum is σ = 20002442256. Its totient is φ = 3333740372.

The previous prime is 10001221103. The next prime is 10001221127. The reversal of 10001221122 is 22112210001.

It is a sphenic number, since it is the product of 3 distinct primes.

10001221122 is an admirable number.

It is a super-2 number, since 2×10001221122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10001221098 and 10001221107.

It is not an unprimeable number, because it can be changed into a prime (10001221127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833435088 + ... + 833435099.

It is an arithmetic number, because the mean of its divisors is an integer number (2500305282).

Almost surely, 2^10001221122 is an apocalyptic number.

10001221122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10001221122 is a wasteful number, since it uses less digits than its factorization.

10001221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666870192.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10001221122 its reverse (22112210001), we get a palindrome (32113431123).

It can be divided in two parts, 10001 and 221122, that multiplied together give a palindrome (2211441122).

The spelling of 10001221122 in words is "ten billion, one million, two hundred twenty-one thousand, one hundred twenty-two".