210002221212122 has 4 divisors (see below), whose sum is σ = 315003331818186. Its totient is φ = 105001110606060.

The previous prime is 210002221212109. The next prime is 210002221212137. The reversal of 210002221212122 is 221212122200012.

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., 205867428382561 + 4134792829561 = 14348081^2 + 2033419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210002221212094 and 210002221212103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52500555303029 + ... + 52500555303032.

Almost surely, 2^{210002221212122} is an apocalyptic number.

210002221212122 is a deficient number, since it is larger than the sum of its proper divisors (105001110606064).

210002221212122 is a wasteful number, since it uses less digits than its factorization.

210002221212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105001110606063.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210002221212122 its reverse (221212122200012), we get a palindrome (431214343412134).

The spelling of 210002221212122 in words is "two hundred ten trillion, two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".