1202122000021 has 6 divisors (see below), whose sum is σ = 1232157173666. Its totient is φ = 1172801949600.

The previous prime is 1202122000019. The next prime is 1202122000033. The reversal of 1202122000021 is 1200002212021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2573532900 + 1199548467121 = 50730^2 + 1095239^2 .

It is not a de Polignac number, because 1202122000021 - 2¹ = 1202122000019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202121999965 and 1202122000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202122000061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357559890 + ... + 357563251.

Almost surely, 2^{1202122000021} is an apocalyptic number.

It is an amenable number.

1202122000021 is a deficient number, since it is larger than the sum of its proper divisors (30035173645).

1202122000021 is an frugal number, since it uses more digits than its factorization.

1202122000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715123223 (or 715123182 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1202122000021 its reverse (1200002212021), we get a palindrome (2402124212042).

The spelling of 1202122000021 in words is "one trillion, two hundred two billion, one hundred twenty-two million, twenty-one", and thus it is an aban number.