222121001001111 has 48 divisors (see below), whose sum is σ = 314509597691904. Its totient is φ = 139292729568000.

The previous prime is 222121001001101. The next prime is 222121001001169. The reversal of 222121001001111 is 111100100121222.

It is a happy number.

It is not a de Polignac number, because 222121001001111 - 2⁶ = 222121001001047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121001001101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39744805 + ... + 44987681.

It is an arithmetic number, because the mean of its divisors is an integer number (6552283285248).

Almost surely, 2^{222121001001111} is an apocalyptic number.

222121001001111 is a deficient number, since it is larger than the sum of its proper divisors (92388596690793).

222121001001111 is a wasteful number, since it uses less digits than its factorization.

222121001001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243264 (or 5243223 counting only the distinct ones).

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

Adding to 222121001001111 its reverse (111100100121222), we get a palindrome (333221101122333).

The spelling of 222121001001111 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one million, one thousand, one hundred eleven".