111222121001001 has 32 divisors (see below), whose sum is σ = 157392214081536. Its totient is φ = 69747730128000.

The previous prime is 111222121000967. The next prime is 111222121001009. The reversal of 111222121001001 is 100100121222111.

It is a happy number.

It is not a de Polignac number, because 111222121001001 - 2⁷ = 111222121000873 is a prime.

It is a super-2 number, since 2×111222121001001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111222121001009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52784371 + ... + 54851016.

It is an arithmetic number, because the mean of its divisors is an integer number (4918506690048).

Almost surely, 2^{111222121001001} is an apocalyptic number.

It is an amenable number.

111222121001001 is a deficient number, since it is larger than the sum of its proper divisors (46170093080535).

111222121001001 is a wasteful number, since it uses less digits than its factorization.

111222121001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107635733.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111222121001001 its reverse (100100121222111), we get a palindrome (211322242223112).

The spelling of 111222121001001 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one thousand, one".