1220211120121 has 16 divisors (see below), whose sum is σ = 1482684825600. Its totient is φ = 980287441920.

The previous prime is 1220211120047. The next prime is 1220211120127. The reversal of 1220211120121 is 1210211120221.

It is a cyclic number.

It is not a de Polignac number, because 1220211120121 - 2²¹ = 1220209022969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220211120095 and 1220211120104.

It is not an unprimeable number, because it can be changed into a prime (1220211120127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21244921 + ... + 21302278.

It is an arithmetic number, because the mean of its divisors is an integer number (92667801600).

Almost surely, 2^{1220211120121} is an apocalyptic number.

It is an amenable number.

1220211120121 is a deficient number, since it is larger than the sum of its proper divisors (262473705479).

1220211120121 is a wasteful number, since it uses less digits than its factorization.

1220211120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42547464.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220211120121 its reverse (1210211120221), we get a palindrome (2430422240342).

The spelling of 1220211120121 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-one".