211121021002 has 4 divisors (see below), whose sum is σ = 316681531506. Its totient is φ = 105560510500.

The previous prime is 211121020897. The next prime is 211121021011. The reversal of 211121021002 is 200120121112.

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

It can be written as a sum of positive squares in only one way, i.e., 188407215481 + 22713805521 = 434059^2 + 150711^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52780255249 + ... + 52780255252.

Almost surely, 2^211121021002 is an apocalyptic number.

211121021002 is a deficient number, since it is larger than the sum of its proper divisors (105560510504).

211121021002 is a wasteful number, since it uses less digits than its factorization.

211121021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105560510503.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211121021002 its reverse (200120121112), we get a palindrome (411241142114).

The spelling of 211121021002 in words is "two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, two".