221020980029 has 2 divisors, whose sum is σ = 221020980030. Its totient is φ = 221020980028.

The previous prime is 221020980007. The next prime is 221020980041. The reversal of 221020980029 is 920089020122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215955384100 + 5065595929 = 464710^2 + 71173^2 .

It is a cyclic number.

It is not a de Polignac number, because 221020980029 - 2¹⁶ = 221020914493 is a prime.

It is a super-2 number, since 2×221020980029² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020980049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510490014 + 110510490015.

It is an arithmetic number, because the mean of its divisors is an integer number (110510490015).

Almost surely, 2^221020980029 is an apocalyptic number.

It is an amenable number.

221020980029 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020980029 is an equidigital number, since it uses as much as digits as its factorization.

221020980029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 221020980029 in words is "two hundred twenty-one billion, twenty million, nine hundred eighty thousand, twenty-nine".