1202002102021 has 4 divisors (see below), whose sum is σ = 1373716688032. Its totient is φ = 1030287516012.

The previous prime is 1202002102003. The next prime is 1202002102039. The reversal of 1202002102021 is 1202012002021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1202002102003) and next prime (1202002102039).

It is a cyclic number.

It is not a de Polignac number, because 1202002102021 - 2¹³ = 1202002093829 is a prime.

It is a super-3 number, since 3×1202002102021³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202002101992 and 1202002102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202002102001) 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, 85857292995 + ... + 85857293008.

It is an arithmetic number, because the mean of its divisors is an integer number (343429172008).

Almost surely, 2^{1202002102021} is an apocalyptic number.

It is an amenable number.

1202002102021 is a deficient number, since it is larger than the sum of its proper divisors (171714586011).

1202002102021 is an equidigital number, since it uses as much as digits as its factorization.

1202002102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171714586010.

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

Adding to 1202002102021 its reverse (1202012002021), we get a palindrome (2404014104042).

The spelling of 1202002102021 in words is "one trillion, two hundred two billion, two million, one hundred two thousand, twenty-one".