2111222121202 has 4 divisors (see below), whose sum is σ = 3166833181806. Its totient is φ = 1055611060600.

The previous prime is 2111222121181. The next prime is 2111222121209. The reversal of 2111222121202 is 2021212221112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1889088062481 + 222134058721 = 1374441^2 + 471311^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2111222121202.

It is not an unprimeable number, because it can be changed into a prime (2111222121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527805530299 + ... + 527805530302.

Almost surely, 2^{2111222121202} is an apocalyptic number.

2111222121202 is a deficient number, since it is larger than the sum of its proper divisors (1055611060604).

2111222121202 is a wasteful number, since it uses less digits than its factorization.

2111222121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055611060603.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2111222121202 its reverse (2021212221112), we get a palindrome (4132434342314).

The spelling of 2111222121202 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred two".