122121120021 has 16 divisors (see below), whose sum is σ = 166750647360. Its totient is φ = 79455922560.

The previous prime is 122121120019. The next prime is 122121120029. The reversal of 122121120021 is 120021121221.

It is not a de Polignac number, because 122121120021 - 2¹ = 122121120019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121120029) 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, 226600 + ... + 543681.

It is an arithmetic number, because the mean of its divisors is an integer number (10421915460).

Almost surely, 2^122121120021 is an apocalyptic number.

It is an amenable number.

122121120021 is a deficient number, since it is larger than the sum of its proper divisors (44629527339).

122121120021 is a wasteful number, since it uses less digits than its factorization.

122121120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771556.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122121120021 its reverse (120021121221), we get a palindrome (242142241242).

The spelling of 122121120021 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".