213001221122 has 4 divisors (see below), whose sum is σ = 319501831686. Its totient is φ = 106500610560.

The previous prime is 213001221109. The next prime is 213001221127. The reversal of 213001221122 is 221122100312.

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., 207144227161 + 5856993961 = 455131^2 + 76531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213001221122.

It is not an unprimeable number, because it can be changed into a prime (213001221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53250305279 + ... + 53250305282.

Almost surely, 2^213001221122 is an apocalyptic number.

213001221122 is a deficient number, since it is larger than the sum of its proper divisors (106500610564).

213001221122 is a wasteful number, since it uses less digits than its factorization.

213001221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106500610563.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213001221122 its reverse (221122100312), we get a palindrome (434123321434).

The spelling of 213001221122 in words is "two hundred thirteen billion, one million, two hundred twenty-one thousand, one hundred twenty-two".