2121001002 has 12 divisors (see below), whose sum is σ = 4595502210. Its totient is φ = 707000328.

The previous prime is 2121000991. The next prime is 2121001019. The reversal of 2121001002 is 2001001212.

It can be written as a sum of positive squares in only one way, i.e., 1125535401 + 995465601 = 33549^2 + 31551^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58916677 + ... + 58916712.

Almost surely, 2^2121001002 is an apocalyptic number.

2121001002 is an abundant number, since it is smaller than the sum of its proper divisors (2474501208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121001002 is a wasteful number, since it uses less digits than its factorization.

2121001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117833397 (or 117833394 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2121001002 is about 46054.3266371358. The cubic root of 2121001002 is about 1284.8338143981.

Adding to 2121001002 its reverse (2001001212), we get a palindrome (4122002214).

The spelling of 2121001002 in words is "two billion, one hundred twenty-one million, one thousand, two".