2052101221 has 2 divisors, whose sum is σ = 2052101222. Its totient is φ = 2052101220.

The previous prime is 2052101189. The next prime is 2052101231. The reversal of 2052101221 is 1221012502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1649496996 + 402604225 = 40614^2 + 20065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2052101221 - 2⁵ = 2052101189 is a prime.

It is a super-2 number, since 2×2052101221² = 8422238842459381682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2052101195 and 2052101204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2052101231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026050610 + 1026050611.

It is an arithmetic number, because the mean of its divisors is an integer number (1026050611).

Almost surely, 2^2052101221 is an apocalyptic number.

It is an amenable number.

2052101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2052101221 is an equidigital number, since it uses as much as digits as its factorization.

2052101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2052101221 is about 45300.1238519278. The cubic root of 2052101221 is about 1270.7679693919.

Adding to 2052101221 its reverse (1221012502), we get a palindrome (3273113723).

The spelling of 2052101221 in words is "two billion, fifty-two million, one hundred one thousand, two hundred twenty-one".