1220010022121 has 4 divisors (see below), whose sum is σ = 1330920024144. Its totient is φ = 1109100020100.

The previous prime is 1220010022097. The next prime is 1220010022201. The reversal of 1220010022121 is 1212200100221.

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 not a de Polignac number, because 1220010022121 - 2¹⁴ = 1220010005737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220010022096 and 1220010022105.

It is not an unprimeable number, because it can be changed into a prime (1220010021121) 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, 55455000995 + ... + 55455001016.

It is an arithmetic number, because the mean of its divisors is an integer number (332730006036).

Almost surely, 2^{1220010022121} is an apocalyptic number.

1220010022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220010022121 is a deficient number, since it is larger than the sum of its proper divisors (110910002023).

1220010022121 is a wasteful number, since it uses less digits than its factorization.

1220010022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110910002022.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220010022121 its reverse (1212200100221), we get a palindrome (2432210122342).

It can be divided in two parts, 12200100 and 22121, that added together give a palindrome (12222221).

The spelling of 1220010022121 in words is "one trillion, two hundred twenty billion, ten million, twenty-two thousand, one hundred twenty-one".