2101020002122 has 4 divisors (see below), whose sum is σ = 3151530003186. Its totient is φ = 1050510001060.

The previous prime is 2101020002111. The next prime is 2101020002129. The reversal of 2101020002122 is 2212000201012.

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., 2089097327641 + 11922674481 = 1445371^2 + 109191^2 .

It is not an unprimeable number, because it can be changed into a prime (2101020002129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525255000529 + ... + 525255000532.

Almost surely, 2^{2101020002122} is an apocalyptic number.

2101020002122 is a deficient number, since it is larger than the sum of its proper divisors (1050510001064).

2101020002122 is a wasteful number, since it uses less digits than its factorization.

2101020002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050510001063.

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

Adding to 2101020002122 its reverse (2212000201012), we get a palindrome (4313020203134).

The spelling of 2101020002122 in words is "two trillion, one hundred one billion, twenty million, two thousand, one hundred twenty-two".