2121000021202 has 4 divisors (see below), whose sum is σ = 3181500031806. Its totient is φ = 1060500010600.

The previous prime is 2121000021187. The next prime is 2121000021241. The reversal of 2121000021202 is 2021200001212.

It is a happy number.

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., 1534107665281 + 586892355921 = 1238591^2 + 766089^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530250005299 + ... + 530250005302.

Almost surely, 2^{2121000021202} is an apocalyptic number.

2121000021202 is a deficient number, since it is larger than the sum of its proper divisors (1060500010604).

2121000021202 is a wasteful number, since it uses less digits than its factorization.

2121000021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060500010603.

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

Adding to 2121000021202 its reverse (2021200001212), we get a palindrome (4142200022414).

The spelling of 2121000021202 in words is "two trillion, one hundred twenty-one billion, twenty-one thousand, two hundred two".