2221111010121 has 8 divisors (see below), whose sum is σ = 2965975251360. Its totient is φ = 1478493721152.

The previous prime is 2221111010119. The next prime is 2221111010171. The reversal of 2221111010121 is 1210101111222.

It is a happy number.

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

It is not a de Polignac number, because 2221111010121 - 2¹ = 2221111010119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221111010121.

It is not an unprimeable number, because it can be changed into a prime (2221111010171) 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, 561735760 + ... + 561739713.

It is an arithmetic number, because the mean of its divisors is an integer number (370746906420).

Almost surely, 2^{2221111010121} is an apocalyptic number.

It is an amenable number.

2221111010121 is a deficient number, since it is larger than the sum of its proper divisors (744864241239).

2221111010121 is a wasteful number, since it uses less digits than its factorization.

2221111010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123476135.

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

Adding to 2221111010121 its reverse (1210101111222), we get a palindrome (3431212121343).

The spelling of 2221111010121 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, ten thousand, one hundred twenty-one".