200020210121989 has 2 divisors, whose sum is σ = 200020210121990. Its totient is φ = 200020210121988.

The previous prime is 200020210121939. The next prime is 200020210121999. The reversal of 200020210121989 is 989121012020002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191729023890625 + 8291186231364 = 13846625^2 + 2879442^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020210121989 - 2¹³ = 200020210113797 is a prime.

It is a super-2 number, since 2×200020210121989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020210121939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010105060994 + 100010105060995.

It is an arithmetic number, because the mean of its divisors is an integer number (100010105060995).

Almost surely, 2^{200020210121989} is an apocalyptic number.

It is an amenable number.

200020210121989 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020210121989 is an equidigital number, since it uses as much as digits as its factorization.

200020210121989 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 37.

The spelling of 200020210121989 in words is "two hundred trillion, twenty billion, two hundred ten million, one hundred twenty-one thousand, nine hundred eighty-nine".