201220100210121 has 16 divisors (see below), whose sum is σ = 274707562542144. Its totient is φ = 130975122668544.

The previous prime is 201220100210113. The next prime is 201220100210123. The reversal of 201220100210121 is 121012001022102.

It is not a de Polignac number, because 201220100210121 - 2³ = 201220100210113 is a prime.

It is a super-2 number, since 2×201220100210121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201220100210121.

It is not an unprimeable number, because it can be changed into a prime (201220100210123) 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, 4429601296 + ... + 4429646721.

It is an arithmetic number, because the mean of its divisors is an integer number (17169222658884).

Almost surely, 2^{201220100210121} is an apocalyptic number.

It is an amenable number.

201220100210121 is a deficient number, since it is larger than the sum of its proper divisors (73487462332023).

201220100210121 is a wasteful number, since it uses less digits than its factorization.

201220100210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8859248200.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201220100210121 its reverse (121012001022102), we get a palindrome (322232101232223).

The spelling of 201220100210121 in words is "two hundred one trillion, two hundred twenty billion, one hundred million, two hundred ten thousand, one hundred twenty-one".