2201210220121 has 12 divisors (see below), whose sum is σ = 2419635630832. Its totient is φ = 2000997999000.

The previous prime is 2201210220119. The next prime is 2201210220169. The reversal of 2201210220121 is 1210220121022.

It is a happy number.

It is not a de Polignac number, because 2201210220121 - 2¹ = 2201210220119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201210220095 and 2201210220104.

It is not an unprimeable number, because it can be changed into a prime (2201210220221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1966786 + ... + 2875876.

Almost surely, 2^{2201210220121} is an apocalyptic number.

It is an amenable number.

2201210220121 is a deficient number, since it is larger than the sum of its proper divisors (218425410711).

2201210220121 is a wasteful number, since it uses less digits than its factorization.

2201210220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929124 (or 929113 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201210220121 its reverse (1210220121022), we get a palindrome (3411430341143).

Subtracting from 2201210220121 its reverse (1210220121022), we obtain a palindrome (990990099099).

The spelling of 2201210220121 in words is "two trillion, two hundred one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".