121122221211201 has 16 divisors (see below), whose sum is σ = 185070102124544. Its totient is φ = 69024107373264.

The previous prime is 121122221211169. The next prime is 121122221211253. The reversal of 121122221211201 is 102112122221121.

It is not a de Polignac number, because 121122221211201 - 2⁵ = 121122221211169 is a prime.

It is a super-2 number, since 2×121122221211201² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (121122221211281) 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, 7857928015 + ... + 7857943428.

It is an arithmetic number, because the mean of its divisors is an integer number (11566881382784).

Almost surely, 2^{121122221211201} is an apocalyptic number.

It is an amenable number.

121122221211201 is a deficient number, since it is larger than the sum of its proper divisors (63947880913343).

121122221211201 is a wasteful number, since it uses less digits than its factorization.

121122221211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15715871820.

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

Adding to 121122221211201 its reverse (102112122221121), we get a palindrome (223234343432322).

The spelling of 121122221211201 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, two hundred one".