2221101202121 has 4 divisors (see below), whose sum is σ = 2237080347600. Its totient is φ = 2205122056644.

The previous prime is 2221101202093. The next prime is 2221101202127. The reversal of 2221101202121 is 1212021011222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221101202121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221101202121.

It is not an unprimeable number, because it can be changed into a prime (2221101202127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7989572531 + ... + 7989572808.

It is an arithmetic number, because the mean of its divisors is an integer number (559270086900).

Almost surely, 2^{2221101202121} is an apocalyptic number.

It is an amenable number.

2221101202121 is a deficient number, since it is larger than the sum of its proper divisors (15979145479).

2221101202121 is a wasteful number, since it uses less digits than its factorization.

2221101202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15979145478.

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

Adding to 2221101202121 its reverse (1212021011222), we get a palindrome (3433122213343).

The spelling of 2221101202121 in words is "two trillion, two hundred twenty-one billion, one hundred one million, two hundred two thousand, one hundred twenty-one".