121021222201 has 16 divisors (see below), whose sum is σ = 132819600960. Its totient is φ = 109355907520.

The previous prime is 121021222199. The next prime is 121021222213. The reversal of 121021222201 is 102222120121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121021222201 - 2¹ = 121021222199 is a prime.

It is a super-2 number, since 2×121021222201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021222271) 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, 14894526 + ... + 14902648.

It is an arithmetic number, because the mean of its divisors is an integer number (8301225060).

Almost surely, 2^121021222201 is an apocalyptic number.

121021222201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121021222201 is a deficient number, since it is larger than the sum of its proper divisors (11798378759).

121021222201 is a wasteful number, since it uses less digits than its factorization.

121021222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16136.

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

Adding to 121021222201 its reverse (102222120121), we get a palindrome (223243342322).

The spelling of 121021222201 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred one".