121211112222201 has 16 divisors (see below), whose sum is σ = 168651540264960. Its totient is φ = 77289462531600.

The previous prime is 121211112222149. The next prime is 121211112222283. The reversal of 121211112222201 is 102222211112121.

It is not a de Polignac number, because 121211112222201 - 2³¹ = 121208964738553 is a prime.

It is a super-2 number, since 2×121211112222201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121211112222001) 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, 50872875 + ... + 53202176.

It is an arithmetic number, because the mean of its divisors is an integer number (10540721266560).

Almost surely, 2^{121211112222201} is an apocalyptic number.

It is an amenable number.

121211112222201 is a deficient number, since it is larger than the sum of its proper divisors (47440428042759).

121211112222201 is a wasteful number, since it uses less digits than its factorization.

121211112222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104091956.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121211112222201 its reverse (102222211112121), we get a palindrome (223433323334322).

The spelling of 121211112222201 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred one".