122121210100011 has 4 divisors (see below), whose sum is σ = 162828280133352. Its totient is φ = 81414140066672.

The previous prime is 122121210100007. The next prime is 122121210100033. The reversal of 122121210100011 is 110001012121221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122121210100011 - 2² = 122121210100007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122121210000011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20353535016666 + ... + 20353535016671.

It is an arithmetic number, because the mean of its divisors is an integer number (40707070033338).

Almost surely, 2^{122121210100011} is an apocalyptic number.

122121210100011 is a deficient number, since it is larger than the sum of its proper divisors (40707070033341).

122121210100011 is an equidigital number, since it uses as much as digits as its factorization.

122121210100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40707070033340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 122121210100011 its reverse (110001012121221), we get a palindrome (232122222221232).

The spelling of 122121210100011 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one hundred thousand, eleven".