21120221202202 has 4 divisors (see below), whose sum is σ = 31680331803306. Its totient is φ = 10560110601100.

The previous prime is 21120221202193. The next prime is 21120221202211. The reversal of 21120221202202 is 20220212202112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21120221202193) and next prime (21120221202211).

It can be written as a sum of positive squares in only one way, i.e., 21106774712521 + 13446489681 = 4594211^2 + 115959^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21120221202202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280055300549 + ... + 5280055300552.

Almost surely, 2^{21120221202202} is an apocalyptic number.

21120221202202 is a deficient number, since it is larger than the sum of its proper divisors (10560110601104).

21120221202202 is a wasteful number, since it uses less digits than its factorization.

21120221202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560110601103.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21120221202202 its reverse (20220212202112), we get a palindrome (41340433404314).

The spelling of 21120221202202 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, two hundred two thousand, two hundred two".