201220210121 has 8 divisors (see below), whose sum is σ = 230438167680. Its totient is φ = 172120305888.

The previous prime is 201220210111. The next prime is 201220210127. The reversal of 201220210121 is 121012022102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201220210121 - 2¹⁸ = 201219947977 is a prime.

It is a super-2 number, since 2×201220210121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201220210096 and 201220210105.

It is not an unprimeable number, because it can be changed into a prime (201220210127) 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, 29509676 + ... + 29516493.

It is an arithmetic number, because the mean of its divisors is an integer number (28804770960).

Almost surely, 2^201220210121 is an apocalyptic number.

It is an amenable number.

201220210121 is a deficient number, since it is larger than the sum of its proper divisors (29217957559).

201220210121 is an equidigital number, since it uses as much as digits as its factorization.

201220210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59026663.

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

Adding to 201220210121 its reverse (121012022102), we get a palindrome (322232232223).

The spelling of 201220210121 in words is "two hundred one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-one".