121222200001021 has 16 divisors (see below), whose sum is σ = 145077580055808. Its totient is φ = 99033454396800.

The previous prime is 121222200001009. The next prime is 121222200001043. The reversal of 121222200001021 is 120100002222121.

It is a happy number.

It is not a de Polignac number, because 121222200001021 - 2²⁷ = 121222065783293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222200000986 and 121222200001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222200001121) 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, 1339693050 + ... + 1339783531.

It is an arithmetic number, because the mean of its divisors is an integer number (9067348753488).

Almost surely, 2^{121222200001021} is an apocalyptic number.

It is an amenable number.

121222200001021 is a deficient number, since it is larger than the sum of its proper divisors (23855380054787).

121222200001021 is a wasteful number, since it uses less digits than its factorization.

121222200001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679476892.

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

Adding to 121222200001021 its reverse (120100002222121), we get a palindrome (241322202223142).

The spelling of 121222200001021 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred million, one thousand, twenty-one".