1220211100121 has 32 divisors (see below), whose sum is σ = 1429454960640. Its totient is φ = 1032299136000.

The previous prime is 1220211100109. The next prime is 1220211100123. The reversal of 1220211100121 is 1210011120221.

It is a cyclic number.

It is not a de Polignac number, because 1220211100121 - 2¹⁸ = 1220210837977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220211100096 and 1220211100105.

It is not an unprimeable number, because it can be changed into a prime (1220211100123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284465 + ... + 1587873.

It is an arithmetic number, because the mean of its divisors is an integer number (44670467520).

Almost surely, 2^{1220211100121} is an apocalyptic number.

It is an amenable number.

1220211100121 is a deficient number, since it is larger than the sum of its proper divisors (209243860519).

1220211100121 is a wasteful number, since it uses less digits than its factorization.

1220211100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303577.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220211100121 its reverse (1210011120221), we get a palindrome (2430222220342).

The spelling of 1220211100121 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".