7002021121 has 4 divisors (see below), whose sum is σ = 7003869012. Its totient is φ = 7000173232.

The previous prime is 7002021107. The next prime is 7002021127. The reversal of 7002021121 is 1211202007.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64963600 + 6937057521 = 8060^2 + 83289^2 .

It is a cyclic number.

It is not a de Polignac number, because 7002021121 - 2¹³ = 7002012929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7002021095 and 7002021104.

It is not an unprimeable number, because it can be changed into a prime (7002021127) 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, 918250 + ... + 925843.

It is an arithmetic number, because the mean of its divisors is an integer number (1750967253).

Almost surely, 2^7002021121 is an apocalyptic number.

It is an amenable number.

7002021121 is a deficient number, since it is larger than the sum of its proper divisors (1847891).

7002021121 is a wasteful number, since it uses less digits than its factorization.

7002021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847890.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 7002021121 is about 83678.0802898824. The cubic root of 7002021121 is about 1913.1152729315.

Adding to 7002021121 its reverse (1211202007), we get a palindrome (8213223128).

The spelling of 7002021121 in words is "seven billion, two million, twenty-one thousand, one hundred twenty-one".