2221121102121 has 8 divisors (see below), whose sum is σ = 3290549780960. Its totient is φ = 1480747401396.

The previous prime is 2221121102113. The next prime is 2221121102173. The reversal of 2221121102121 is 1212011211222.

It is not a de Polignac number, because 2221121102121 - 2³ = 2221121102113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221121102094 and 2221121102103.

It is not an unprimeable number, because it can be changed into a prime (2221121102111) 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, 41131872235 + ... + 41131872288.

It is an arithmetic number, because the mean of its divisors is an integer number (411318722620).

Almost surely, 2^{2221121102121} is an apocalyptic number.

It is an amenable number.

2221121102121 is a deficient number, since it is larger than the sum of its proper divisors (1069428678839).

2221121102121 is an equidigital number, since it uses as much as digits as its factorization.

2221121102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82263744532 (or 82263744526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221121102121 its reverse (1212011211222), we get a palindrome (3433132313343).

The spelling of 2221121102121 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty-one".