1002121002 has 24 divisors (see below), whose sum is σ = 2173491840. Its totient is φ = 333697320.

The previous prime is 1002120991. The next prime is 1002121007. The reversal of 1002121002 is 2001212001.

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

It is not an unprimeable number, because it can be changed into a prime (1002121007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10252 + ... + 45927.

It is an arithmetic number, because the mean of its divisors is an integer number (90562160).

Almost surely, 2^1002121002 is an apocalyptic number.

1002121002 is an abundant number, since it is smaller than the sum of its proper divisors (1171370838).

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

1002121002 is a wasteful number, since it uses less digits than its factorization.

1002121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57178 (or 57175 counting only the distinct ones).

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

The square root of 1002121002 is about 31656.2948242526. The cubic root of 1002121002 is about 1000.7065014049.

Adding to 1002121002 its reverse (2001212001), we get a palindrome (3003333003).

Subtracting 1002121002 from its reverse (2001212001), we obtain a palindrome (999090999).

The spelling of 1002121002 in words is "one billion, two million, one hundred twenty-one thousand, two".