202201100212121 has 16 divisors (see below), whose sum is σ = 217431613743360. Its totient is φ = 187431663104640.

The previous prime is 202201100212117. The next prime is 202201100212127. The reversal of 202201100212121 is 121212001102202.

It is a cyclic number.

It is not a de Polignac number, because 202201100212121 - 2² = 202201100212117 is a prime.

It is a super-2 number, since 2×202201100212121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202201100212121.

It is not an unprimeable number, because it can be changed into a prime (202201100212127) 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, 27880700 + ... + 34376381.

It is an arithmetic number, because the mean of its divisors is an integer number (13589475858960).

Almost surely, 2^{202201100212121} is an apocalyptic number.

It is an amenable number.

202201100212121 is a deficient number, since it is larger than the sum of its proper divisors (15230513531239).

202201100212121 is a wasteful number, since it uses less digits than its factorization.

202201100212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62260784.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202201100212121 its reverse (121212001102202), we get a palindrome (323413101314323).

The spelling of 202201100212121 in words is "two hundred two trillion, two hundred one billion, one hundred million, two hundred twelve thousand, one hundred twenty-one".