210121220002 has 8 divisors (see below), whose sum is σ = 315764422812. Its totient is φ = 104866412400.

The previous prime is 210121219969. The next prime is 210121220027. The reversal of 210121220002 is 200022121012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 201878577481 + 8242642521 = 449309^2 + 90789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97097449 + ... + 97099612.

Almost surely, 2^210121220002 is an apocalyptic number.

210121220002 is a deficient number, since it is larger than the sum of its proper divisors (105643202810).

210121220002 is a wasteful number, since it uses less digits than its factorization.

210121220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194197604.

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

Adding to 210121220002 its reverse (200022121012), we get a palindrome (410143341014).

The spelling of 210121220002 in words is "two hundred ten billion, one hundred twenty-one million, two hundred twenty thousand, two".