2121020111222 has 4 divisors (see below), whose sum is σ = 3181530166836. Its totient is φ = 1060510055610.

The previous prime is 2121020111207. The next prime is 2121020111263. The reversal of 2121020111222 is 2221110201212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2121020111222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530255027804 + ... + 530255027807.

It is an arithmetic number, because the mean of its divisors is an integer number (795382541709).

Almost surely, 2^{2121020111222} is an apocalyptic number.

2121020111222 is a deficient number, since it is larger than the sum of its proper divisors (1060510055614).

2121020111222 is a wasteful number, since it uses less digits than its factorization.

2121020111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060510055613.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121020111222 its reverse (2221110201212), we get a palindrome (4342130312434).

The spelling of 2121020111222 in words is "two trillion, one hundred twenty-one billion, twenty million, one hundred eleven thousand, two hundred twenty-two".